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123-641: It has an area of 10,620 km (4,100 sq mi) and a population of 69,900, 90.4% of which are Tibetan people . Ruo'ergai County is found in the easternmost sections of the Tibetan Plateau . The county is primarily a highland basin made up of the Zoigê Marsh between the Min Mountains and Amne Machin . The western border of the county, shared with Maqu County in Gansu, is formed by

246-580: A " Special Relationship " with the United Kingdom and strong ties with Canada , Australia , New Zealand , the Philippines , Japan , South Korea , Israel , and several European Union countries ( France , Italy , Germany , Spain , and Poland ). The U.S. works closely with its NATO allies on military and national security issues, and with countries in the Americas through

369-439: A Yellow River farmers-like population c. 4,700 years ago, resulting in the formation of a "Tibetan cline". Modern Tibetans display genetic continuity to ancient samples from Nepal , with their genetic diversity having been reduced compared to 'Early Ancient Tibetans' suggesting low to none geneflow from outside groups since c. 3,500 years ago. Subsequent internal geneflow resulted in "a northeastern plateau ancestry associated with

492-483: A clade with them to the exclusion of other Eurasians. The Northern East Asian lineage can be represented by Neolithic Yellow River farmers, which are associated with the spread of Sino-Tibetan languages. Modern Tibetans derive up to 20% from Paleolithic Tibetans, with the remaining 80% being primarily derived from Yellow River farmers. The formation of the present-day Tibetan gene pool dates back at least 5,100 years BP. Northeastern Tibetans display additional geneflow from

615-470: A clockwise direction, although the reverse direction is true for Bön . Tibetan Buddhists chant the prayer " Om mani padme hum ", while the practitioners of Bön chant "Om matri muye sale du". Tibet is rich in culture. Tibetan festivals such as Losar , Shoton , Linka , and the Bathing Festival are deeply rooted in indigenous religion and also contain foreign influences. Each person takes part in

738-587: A cluster of mutually unintelligible Sino-Tibetan languages spoken by approximately 8 million people, primarily Tibetan, living across a wide area of East and South Asia , including the Tibetan Plateau and Baltistan , Ladakh , Nepal, Sikkim , and Bhutan. Classical Tibetan is a major regional literary language, particularly for its use in Buddhist literature. The Central Tibetan language (the dialects of Ü-Tsang , including Lhasa ), Khams Tibetan , and Amdo Tibetan are generally considered to be dialects of

861-542: A coordinated, continent-wide military effort. Finally, deteriorating relations between the British military establishment and the colonists, relations that were already less than positive, set the stage for further distrust and dislike of British troops. Following their victory in the French and Indian War, Britain began to assert greater control over local colonial affairs, resulting in colonial political resistance ; one of

984-534: A decentralized government that operated until 1789. After the British surrender at the siege of Yorktown in 1781 American sovereignty was internationally recognized by the Treaty of Paris (1783), through which the U.S. gained territory stretching west to the Mississippi River, north to present-day Canada, and south to Spanish Florida . The Northwest Ordinance (1787) established the precedent by which

1107-680: A divergent sister branch to them. Full genome studies revealed that Tibetans and other high-alltitude East Asians formed from two divergent Ancient East Eurasian lineages in Eastern Asia, specifically a lineage representing the Paleolithic population of the Tibetan Plateau, and a lineage associated with Ancient Northern East Asians . The Paleolithic Tibetan lineage was found to be distinct from other deep lineages such as Ust'-Ishim , Hoabinhian / Onge or Tianyuan , but forming

1230-407: A few prominent industrialists , largely by their formation of trusts and monopolies to prevent competition. Tycoons led the nation's expansion in the railroad , petroleum , and steel industries. The United States emerged as a pioneer of the automotive industry . These changes were accompanied by significant increases in economic inequality , slum conditions , and social unrest , creating

1353-454: A frequency of >75%. The widespread presence of this gene may represent one of "the fastest genetic change ever observed in humans". Recent research into the ability of Tibetans' metabolism to function normally in the oxygen-deficient atmosphere above 4,400 metres (14,400 ft) shows that, although Tibetans living at high altitudes have no more oxygen in their blood than other people, they have ten times more nitric oxide and double

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1476-666: A global reach. The U.S. is a founding member of the World Bank , Organization of American States , NATO , and the United Nations , as well as a permanent member of the UN Security Council . The first documented use of the phrase "United States of America" is a letter from January 2, 1776. Stephen Moylan , a Continental Army aide to General George Washington , wrote to Joseph Reed , Washington's aide-de-camp , seeking to go "with full and ample powers from

1599-559: A major role in the lives of the Tibetan people, conducting religious ceremonies and taking care of the monasteries. Pilgrims plant prayer flags over sacred grounds as a symbol of good luck. The prayer wheel is a means of simulating the chant of a mantra by physically revolving the object several times in a clockwise direction. It is widely seen among Tibetan people. In order not to desecrate religious artifacts such as Stupas , mani stones, and Gompas , Tibetan Buddhists walk around them in

1722-598: A period of heightened, overt racism following Reconstruction, a time often called the nadir of American race relations . A series of Supreme Court decisions, including Plessy v. Ferguson , emptied the Fourteenth and Fifteenth Amendments of their force, allowing Jim Crow laws in the South to remain unchecked, sundown towns in the Midwest, and segregation in communities across the country , which would be reinforced by

1845-488: A prominent leader in the early 1960s. The Great Society plan of President Lyndon Johnson 's administration resulted in groundbreaking and broad-reaching laws, policies and a constitutional amendment to counteract some of the worst effects of lingering institutional racism . The counterculture movement in the U.S. brought significant social changes, including the liberalization of attitudes toward recreational drug use and sexuality . It also encouraged open defiance of

1968-526: A sense of manifest destiny . The Missouri Compromise attempted to balance the desire of northern states to prevent the expansion of slavery into new territories with that of southern states to extend it, admitting Missouri as a slave state and Maine as a free state. It further prohibited slavery in all other lands of the Louisiana Purchase north of the 36°30′ parallel . As Americans expanded further into land inhabited by Native Americans,

2091-614: A sense of American identity as well. Men who otherwise never left their own colony now traveled across the continent to fight alongside men from decidedly different backgrounds but who were no less "American". British officers trained American officers for battle, most notably George Washington ; these officers would lend their skills and expertise to the colonists' cause during the American Revolutionary War to come. In addition, colonial legislatures and officials found it necessary to cooperate intensively in pursuit of

2214-425: A shorter version with pants underneath. The style of the clothing varies between regions. Nomads often wear thick sheepskin versions. In more urban places like Lhasa, men and women dress in modern clothing, and many choose to wear chuba during festivals and holidays like Losar . Tibet has national literature that has both religious, semi-spiritual and secular elements. While the religious texts are well-known, Tibet

2337-402: A single language, especially since they all share the same literary language, while Dzongkha , Sikkimese , Sherpa , and Ladakhi are generally considered to be separate languages. The ethnic roots of Tibetans can be traced back to a deep Eastern Asian lineage representing the indigenous population of the Tibetan plateau since c. 40,000 to 30,000 years ago, and arriving Neolithic farmers from

2460-409: A total of 156 chapters in the form of Thangkas, which tell about the archaic Tibetan medicine and the essences of medicines in other places. The Cuisine of Tibet reflects the rich heritage of the country and people's adaptation to high altitude and religious culinary restrictions. The most important crop is barley . Dough made from barley flour, called tsampa , is the staple food of Tibet . This

2583-464: A year). Juvenile correctional facilities are operated by local or state governments and serve as longer-term placements for any minor adjudicated as delinquent and ordered by a judge to be confined. As of January 2023, the United States has the sixth-highest per capita incarceration rate in the world—531 people per 100,000 inhabitants—and the largest prison and jail population in

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2706-432: Is also home to the semi-spiritual Gesar Epic , which is the longest epic in the world and is popular throughout Mongolia and Central Asia. There are secular texts such as The Dispute Between Tea and Chang (Tibetan beer) and Khache Phalu's Advice . Monogamy is common throughout Tibet. Marriages are sometimes arranged by the parents if the son or daughter has not picked their own partner by a certain age. However, polyandry

2829-438: Is available for heating or lighting, so flat roofs are built to conserve heat, and multiple windows are constructed to let in sunlight. Walls are usually sloped inwards at 10 degrees as a precaution against frequent earthquakes in the mountainous area. Tibetan homes and buildings are white-washed on the outside, and beautifully decorated inside. Standing at 117 metres (384 ft) in height and 360 metres (1,180 ft) in width,

2952-591: Is believed to be the first widespread culture in the Americas. Over time, indigenous North American cultures grew increasingly sophisticated, and some, such as the Mississippian culture , developed agriculture , architecture , and complex societies . In the post-archaic period , the Mississippian cultures were located in the midwestern , eastern , and southern regions, and the Algonquian in

3075-400: Is conducted at the end of the play. There are also many historical myths/epics written by high lamas about the reincarnation of a "chosen one" who will do great things. The most unusual feature of Tibetan architecture is that many of the houses and monasteries are built on elevated, sunny sites facing the south. They are commonly made of a mixture of rocks, wood, cement and earth. Little fuel

3198-487: Is drawn from Buddhist stories and Tibetan history. Tibetan opera was founded in the fourteenth century by Thang Tong Gyalpo , a lama and a bridge-builder. Gyalpo and seven girls he recruited organized the first performance to raise funds for building bridges to facilitate transportation in Tibet. The tradition continued uninterrupted for nearly seven hundred years, and performances are held on various festive occasions such as

3321-511: Is either rolled into noodles or made into steamed dumplings called momo . Meat dishes are likely to be yak , goat or mutton , often dried or cooked into a spicy stew with potatoes . Mustard seed is cultivated in Tibet and therefore features heavily in its cuisine. Yak yogurt , butter and cheese are frequently eaten and well-prepared yogurt is considered something of a prestige item. Men and Women wear long thick dresses ( chuba ) in more traditional and rural regions. The men wear

3444-661: Is estimated to be around 6.7 million. In addition to the majority living in Tibet Autonomous Region of China , significant numbers of Tibetans live in the Chinese provinces of Gansu , Qinghai , Sichuan , and Yunnan , as well as in India , Nepal , and Bhutan . The Tibetic languages belong to the Tibeto-Burman language group . The traditional or mythological explanation of the Tibetan people's origin

3567-431: Is heavily restricted during the winter months from late October to early May. Sitting at an altitude of more than 11,000 feet, high-altitude sickness is another common problem for tourists. Ruo'ergai County has 7 towns and 6 townships : Tibetan people The Tibetan people ( Tibetan : བོད་པ་ , Wylie : bod pa , THL : bö pa ) are an East Asian ethnic group native to Tibet . Their current population

3690-498: Is known as the presidential system , in contrast to the parliamentary system , where the executive is part of the legislative body. Many countries around the world imitated this aspect of the 1789 Constitution of the United States , especially in the Americas. The Constitution is silent on political parties. However, they developed independently in the 18th century with the Federalist and Anti-Federalist parties. Since then,

3813-438: Is now the United States experienced conflicts with Native Americans, they also engaged in trade, exchanging European tools for food and animal pelts. Relations ranged from close cooperation to warfare and massacres. The colonial authorities often pursued policies that forced Native Americans to adopt European lifestyles, including conversion to Christianity. Along the eastern seaboard, settlers trafficked African slaves through

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3936-555: Is practiced in parts of Tibet. This is usually done to avoid division of property and provide financial security. United States The United States of America ( USA ), commonly known as the United States ( U.S. ) or America , is a country primarily located in North America . It is a federal union of 50 states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to

4059-585: Is that they are the descendants of the human Pha Trelgen Changchup Sempa and rock ogress Ma Drag Sinmo. It is thought that most of the Tibeto-Burman speakers in southwest China , including Tibetans, are direct descendants from the ancient Qiang people . Most Tibetans practice Tibetan Buddhism , although a significant minority observe the indigenous Bon religion. There are also smaller communities of Tibetan Muslims and Christians. Tibetan Buddhism influences Tibetan art , drama and architecture, while

4182-552: Is the federal agency charged with addressing most environmental-related issues . The idea of wilderness has shaped the management of public lands since 1964, with the Wilderness Act . The Endangered Species Act of 1973 provides a way to protect threatened and endangered species and their habitats. The United States Fish and Wildlife Service implements and enforces the Act. In 2024, the U.S. ranked 34th among 180 countries in

4305-603: The Allies of World War I , helping to turn the tide against the Central Powers . In 1920, a constitutional amendment granted nationwide women's suffrage . During the 1920s and '30s, radio for mass communication and the invention of early television transformed communications nationwide. The Wall Street Crash of 1929 triggered the Great Depression , which President Franklin D. Roosevelt responded to with

4428-553: The Atlantic slave trade . The original Thirteen Colonies that would later found the United States were administered as possessions of Great Britain , and had local governments with elections open to most white male property owners . The colonial population grew rapidly, eclipsing Native American populations; by the 1770s, the natural increase of the population was such that only a small minority of Americans had been born overseas. The colonies' distance from Britain allowed for

4551-487: The Balti people are a Muslim ethnicity of Tibetan descent numbering around 300,000. There is some dispute over the current and historical number of Tibetans. The Central Tibetan Administration claims that the 5.4 million number is a decrease from 6.3 million in 1959 while the Chinese government claims that it is an increase from 2.7 million in 1954. However, the question depends on the definition and extent of "Tibet" ;

4674-817: The Bering land bridge more than 12,000 years ago, and formed various civilizations and societies . British colonization led to the first settlement of the Thirteen Colonies in Virginia in 1607. Clashes with the British Crown over taxation and political representation sparked the American Revolution , with the Second Continental Congress formally declaring independence on July 4, 1776. Following its victory in

4797-471: The EPAS1 gene , also referred to as the "super-athlete gene", which regulates the body's production of hemoglobin, allowing for greater efficiency in the use of oxygen. The genetic basis of Tibetan adaptations have been attributed to a mutation in the EPAS1 gene, and has become prevalent in the past 5,000 years. Ancient Tibetans carried this allele at a frequency of 25–58%, while modern Tibetans carry it at

4920-549: The Environmental Performance Index . The country joined the Paris Agreement on climate change in 2016 and has many other environmental commitments. The United States is a federal republic of 50 states and a separate federal capital district, Washington, D.C. It also asserts sovereignty over five unincorporated territories and several uninhabited island possessions . The U.S. is

5043-500: The Federal Bureau of Investigation (FBI) and the U.S. Marshals Service have national jurisdiction and specialized duties, such as protecting civil rights , national security and enforcing U.S. federal courts ' rulings and federal laws. State courts conduct most civil and criminal trials, and federal courts handle designated crimes and appeals of state court decisions . There is no unified "criminal justice system" in

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5166-720: The Great Lakes , Mississippi River and Gulf of Mexico . British colonization of the East Coast began with the Virginia Colony (1607) and Plymouth Colony (1620). The Mayflower Compact and the Fundamental Orders of Connecticut established precedents for representative self-governance and constitutionalism that would develop throughout the American colonies. While European settlers in what

5289-719: The Great Lakes region and along the Eastern Seaboard , while the Hohokam culture and Ancestral Puebloans inhabited the southwest . Native population estimates of what is now the United States before the arrival of European immigrants range from around 500,000 to nearly 10 million. Christopher Columbus began exploring the Caribbean for Spain in 1492, leading to Spanish-speaking settlements and missions from Puerto Rico and Florida to New Mexico and California . France established its own settlements along

5412-524: The House of Representatives , a lower house based on population; and the Senate , an upper house based on equal representation for each state. Federalism provides substantial autonomy to the 50 states, while the country's political culture promotes liberty , equality , individualism , personal autonomy , and limited government . One of the world's most developed countries , the United States has had

5535-596: The Midwest . At the same time, about one million French Canadians migrated from Quebec to New England . During the Great Migration , millions of African Americans left the rural South for urban areas in the North. Alaska was purchased from Russia in 1867. The Compromise of 1877 effectively ended Reconstruction and white supremacists took local control of Southern politics . African Americans endured

5658-688: The National Park Service and other agencies. About 28% of the country's land is publicly owned and federally managed, primarily in the Western States . Most of this land is protected , though some is leased for commercial use, and less than one percent is used for military purposes. Environmental issues in the United States include debates on non-renewable resources and nuclear energy , air and water pollution , biodiversity , logging and deforestation , and climate change . The U.S. Environmental Protection Agency (EPA)

5781-652: The New Deal , a series of sweeping programs and public works projects combined with financial reforms and regulations . All were intended to protect against future economic depressions. Initially neutral during World War II , the U.S. began supplying war materiel to the Allies of World War II in March 1941 and entered the war in December after the Empire of Japan 's attack on Pearl Harbor . The U.S. developed

5904-778: The Organization of American States and the United States–Mexico–Canada Free Trade Agreement . In South America, Colombia is traditionally considered to be the closest ally of the United States. The U.S. exercises full international defense authority and responsibility for Micronesia , the Marshall Islands , and Palau through the Compact of Free Association . It has increasingly conducted strategic cooperation with India , but its ties with China have steadily deteriorated. Since 2014,

6027-648: The Pentium microprocessor in accordance with Moore's law , rechargeable lithium-ion batteries , the first gene therapy trial, and cloning either emerged in the U.S. or were improved upon there. The Human Genome Project was formally launched in 1990, while Nasdaq became the first stock market in the United States to trade online in 1998. In the Gulf War of 1991, an American-led international coalition of states expelled an Iraqi invasion force that had occupied neighboring Kuwait . The September 11 attacks on

6150-586: The Potala Palace is considered the most important example of Tibetan architecture. Formerly the residence of the Dalai Lama , it contains over a thousand rooms within thirteen stories and houses portraits of the past Dalai Lamas and statues of the Buddha. It is divided between the outer White Palace, which serves as the administrative quarters, and the inner Red Quarters, which houses the assembly hall of

6273-738: The Rai people , followed by the Magars and the Tamang . Tibetan males predominantly belong to the paternal lineage D-M174 followed by lower amounts of O-M175 . Tibetan females belong mainly to the Northeast Asian maternal haplogroups M9a1a, M9a1b, D4g2, D4i and G2ac, showing continuity with ancient middle and upper Yellow River populations. Although "East Asian Highlanders" (associated with haplogroup D1 ) are closely related to East Asian lowland farmers (associated with haplogroup O ), they form

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6396-588: The Sherpa people have allele frequencies which are often found in other Tibeto-Burman regions, the strongest affinity was for Tibetan population sample studies done in the Tibet Autonomous Region. Genetically, the Sherpa cluster closest with the sampled Tibetan and Han populations. Additionally, the Sherpa and Tibetans had exhibited affinity for several Nepalese populations, with the strongest for

6519-534: The Soviet Union's collapse and the end of the Cold War in 1991, the U.S. emerged as the world's sole superpower , wielding significant geopolitical influence globally . The U.S. national government is a presidential constitutional federal republic and liberal democracy with three separate branches : legislative , executive , and judicial . It has a bicameral national legislature composed of

6642-591: The Spanish–American War . (The Philippines was granted full independence from the U.S. on July 4, 1946, following World War II. Puerto Rico and Guam have remained U.S. territories.) American Samoa was acquired by the United States in 1900 after the Second Samoan Civil War . The U.S. Virgin Islands were purchased from Denmark in 1917. The United States entered World War I alongside

6765-863: The Tibet Autonomous Region , 1,496,524 people in Sichuan Province, 1,375,059 people in Qinghai Province, 488,359 people in Gansu Province (mostly in Gannan Tibetan Autonomous Prefecture and Bairi Tibetan Autonomous County ) and 142,257 people in Yunnan Province (mostly in Diqing Tibetan Autonomous Prefecture ). Tibetans account for 0.47% of the total population of the country. Tibetans account for 90.48% of

6888-437: The Tibetan Government in Exile ) counts 145,150 Tibetans outside Tibet: a little over 100,000 in India; over 16,000 in Nepal; over 1,800 in Bhutan, and over 25,000 in other parts of the world. There are Tibetan communities in the United States , Australia , Brazil , Canada , Costa Rica , France , Mexico , Norway , Mongolia , Germany , Switzerland and the United Kingdom . In the Baltistan region of Northern Pakistan,

7011-526: The Yellow River within the last 10,000 years, and which can be associated with having introduced the Sino-Tibetan languages . Modern Tibetan populations are genetically most similar to other East Asian populations, especially Han Chinese , Bhutanese , as well as other Sino-Tibetan-speaking populations . They show relatively more genetic affinity for modern Central Asian than modern Siberian populations. They also share some genetic affinity for South Asian groups . Genetic studies shows that many of

7134-399: The cotton gin made the institution increasingly profitable for Southern elites . This sectional conflict regarding slavery culminated in the American Civil War (1861–1865). Eleven slave states seceded and formed the Confederate States of America , while the other states remained in the Union . War broke out in April 1861 after the Confederates bombarded Fort Sumter . After

7257-413: The fall of communism and the collapse of the Soviet Union , which marked the end of the Cold War and left the United States as the world's sole superpower . The 1990s saw the longest recorded economic expansion in American history , a dramatic decline in U.S. crime rates , and advances in technology . Throughout this decade, technological innovations such as the World Wide Web , the evolution of

7380-445: The largest nominal GDP since about 1890 and accounted for over 15% of the global economy in 2023. It possesses by far the largest amount of wealth of any country and has the highest disposable household income per capita among OECD countries. The U.S. ranks among the world's highest in economic competitiveness , productivity , innovation , human rights , and higher education . Its hard power and cultural influence have

7503-406: The 1775 Battles of Lexington and Concord , igniting the American Revolutionary War . At the Second Continental Congress , the colonies appointed George Washington commander-in-chief of the Continental Army , and created a committee that named Thomas Jefferson to draft the Declaration of Independence . Two days after passing the Lee Resolution to create an independent nation the Declaration

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7626-408: The 1775–1783 Revolutionary War , the country continued to expand westward across North America , resulting in the dispossession of native inhabitants . As more states were admitted , a North–South division over slavery led to the secession of the Confederate States of America , which fought states remaining in the Union in the 1861–1865 American Civil War . With the victory and preservation of

7749-466: The 2010s, political polarization in the country increased between liberal and conservative factions. This polarization was capitalized upon in the January 2021 Capitol attack , when a mob of insurrectionists entered the U.S. Capitol and sought to prevent the peaceful transfer of power in an attempted self-coup d'état . The United States is the world's third-largest country by total area behind Russia and Canada. The 48 contiguous states and

7872-422: The 8th century. Rectangular and painted on cotton or linen, they usually depict traditional motifs including religious, astrological, and theological subjects, and sometimes a mandala . To ensure that the image will not fade, organic and mineral pigments are added, and the painting is framed in colorful silk brocades. Tibetan folk opera, known as lhamo , is a combination of dances, chants and songs. The repertoire

7995-426: The American West have an alpine climate . The climate is arid in the Southwest, Mediterranean in coastal California , and oceanic in coastal Oregon , Washington , and southern Alaska . Most of Alaska is subarctic or polar . Hawaii , the southern tip of Florida and U.S. territories in the Caribbean and Pacific are tropical . States bordering the Gulf of Mexico are prone to hurricanes, and most of

8118-451: The Bathing Festival three times: at birth, at marriage, and at death. Tibetan art is deeply religious in nature, from the exquisitely detailed statues found in Gonpas to wooden carvings and the intricate designs of the Thangka paintings. Tibetan art can be found in almost every object and every aspect of daily life. Thangka paintings, a syncretism of Indian scroll-painting with Nepalese and Kashmiri painting, appeared in Tibet around

8241-420: The Declaration of Independence on July 4, 1776. The term "United States" and the initialism "U.S.", used as nouns or as adjectives in English, are common short names for the country. The initialism "USA", a noun, is also common. "United States" and "U.S." are the established terms throughout the U.S. federal government , with prescribed rules. In English, the term "America" rarely refers to topics unrelated to

8364-404: The District of Columbia occupy a combined area of 3,119,885 square miles (8,080,470 km ). The coastal plain of the Atlantic seaboard gives way to inland forests and rolling hills in the Piedmont plateau region. The Appalachian Mountains and the Adirondack massif separate the East Coast from the Great Lakes and the grasslands of the Midwest . The Mississippi River System ,

8487-458: The Elder concluded that major military resources needed to be devoted to North America to win the war against France. For the first time, the continent became one of the main theaters of what could be termed a " world war ". The British colonies' position as an integral part of the British Empire became more apparent during the war, with British military and civilian officials becoming a more significant presence in American life. The war increased

8610-465: The January 1863 Emancipation Proclamation , many freed slaves joined the Union army . The war began to turn in the Union's favor following the 1863 Siege of Vicksburg and Battle of Gettysburg , and the Confederacy surrendered in 1865 after the Union's victory in the Battle of Appomattox Court House . The Reconstruction era followed the war. After the assassination of President Abraham Lincoln , Reconstruction Amendments were passed to protect

8733-440: The Lamas, chapels, 10,000 shrines, and a vast library of Buddhist scriptures. Traditional Tibetan medicine utilizes up to two thousand types of plants, forty animal species, and fifty minerals. One of the key figures in its development was the renowned 8th century physician Yuthog Yontan Gonpo , who produced the Four Medical Tantras integrating material from the medical traditions of Persia, India and China. The tantras contained

8856-474: The Lingka and Shoton festival. The performance is usually a drama, held on a barren stage that combines dances, chants, and songs. Colorful masks are sometimes worn to identify a character, with red symbolizing a king and yellow indicating deities and lamas. The performance starts with a stage purification and blessings. A narrator then sings a summary of the story, and the performance begins. Another ritual blessing

8979-611: The Rocky Mountains, the Yellowstone Caldera , is the continent's largest volcanic feature. In 2021, the United States had 8% of global permanent meadows and pastures and 10% of cropland. With its large size and geographic variety, the United States includes most climate types. East of the 100th meridian , the climate ranges from humid continental in the north to humid subtropical in the south. The western Great Plains are semi-arid . Many mountainous areas of

9102-647: The U.S. has become a key ally of Ukraine ; it has also provided the country with significant military equipment and other support in response to Russia's 2022 invasion . The president is the commander-in-chief of the United States Armed Forces and appoints its leaders, the secretary of defense and the Joint Chiefs of Staff . The Department of Defense , which is headquartered at the Pentagon near Washington, D.C., administers five of

9225-661: The U.S. territories." Despite disparate systems of confinement, four main institutions dominate: federal prisons , state prisons , local jails, and juvenile correctional facilities . Federal prisons are run by the Federal Bureau of Prisons and hold people who have been convicted of federal crimes, including pretrial detainees. State prisons, run by the official department of correction of each state, hold sentenced people serving prison time (usually longer than one year) for felony offenses. Local jails are county or municipal facilities that incarcerate defendants prior to trial; they also hold those serving short sentences (typically under

9348-464: The United States and the peaceful transfer of power , respectively. The Louisiana Purchase of 1803 from France nearly doubled the territory of the United States. Lingering issues with Britain remained , leading to the War of 1812 , which was fought to a draw. Spain ceded Florida and its Gulf Coast territory in 1819. In the late 18th century, American settlers began to expand westward , many with

9471-775: The United States entered the Cold War, where geopolitical tensions between the U.S. and the Soviet Union led the two countries to dominate world affairs . The U.S. utilized the policy of containment to limit the USSR's sphere of influence, and prevailed in the Space Race , which culminated with the first crewed Moon landing in 1969. Domestically, the U.S. experienced economic growth , urbanization , and population growth following World War II . The civil rights movement emerged, with Martin Luther King Jr. becoming

9594-666: The United States has operated as a de facto two-party system , though the parties in that system have been different at different times. The two main national parties are presently the Democratic and the Republican . The former is perceived as relatively liberal in its political platform while the latter is perceived as relatively conservative . In the American federal system , sovereign powers are shared between two levels of elected government: national and state. People in

9717-593: The United States in 2001 by the pan-Islamist militant organization al-Qaeda led to the war on terror , and subsequent military interventions in Afghanistan and Iraq . The cultural impact of the attacks was profound and long-lasting. The U.S. housing bubble culminated in 2007 with the Great Recession , the largest economic contraction since the Great Depression. Coming to a head in

9840-656: The United States of America to Spain" to seek assistance in the Revolutionary War effort. The first known public usage is an anonymous essay published in the Williamsburg newspaper, The Virginia Gazette , on April 6, 1776. By June 1776, the "United States of America" appeared in the Articles of Confederation and the Declaration of Independence . The Second Continental Congress adopted

9963-601: The United States, slavery was abolished nationally . By 1900, the country had established itself as a great power , a status solidified after its involvement in World War I . After Japan 's attack on Pearl Harbor in December 1941, the U.S. entered World War II . Its aftermath left the U.S. and the Soviet Union as the world's two superpowers and led to the Cold War , during which both countries struggled for ideological dominance and international influence . Following

10086-541: The United States, despite the usage of "the Americas " as the totality of North and South America. "The States" is an established colloquial shortening of the name, used particularly from abroad; "stateside" is the corresponding adjective or adverb. The first inhabitants of North America migrated from Siberia across the Bering land bridge about 12,000 years ago; the Clovis culture , which appeared around 11,000 BC,

10209-624: The United States, except Iran , North Korea , and Bhutan . Though Taiwan does not have formal diplomatic relations with the U.S., it maintains close unofficial relations. The United States regularly supplies Taiwan with military equipment to deter potential Chinese aggression. Its geopolitical attention also turned to the Indo-Pacific when the United States joined the Quadrilateral Security Dialogue with Australia, India, and Japan. The United States has

10332-509: The United States. The American prison system is largely heterogenous, with thousands of relatively independent systems operating across federal, state, local, and tribal levels. In 2023, "these systems [held] almost 2 million people in 1,566 state prisons, 98 federal prisons, 3,116 local jails, 1,323 juvenile correctional facilities, 181 immigration detention facilities, and 80 Indian country jails, as well as in military prisons , civil commitment centers, state psychiatric hospitals, and prisons in

10455-457: The contiguous United States are in the State of California, about 84 miles (135 km) apart. At an elevation of 20,310 feet (6,190.5 m), Alaska's Denali is the highest peak in the country and continent. Active volcanoes are common throughout Alaska's Alexander and Aleutian Islands , and Hawaii consists of volcanic islands. The supervolcano underlying Yellowstone National Park in

10578-556: The country's GDP. The U.S. has 42% of the world's nuclear weapons —the second-largest share after Russia. The United States has the third-largest combined armed forces in the world, behind the Chinese People's Liberation Army and Indian Armed Forces . The military operates about 800 bases and facilities abroad, and maintains deployments greater than 100 active duty personnel in 25 foreign countries. State defense forces (SDFs) are military units that operate under

10701-469: The country's territory would expand with the admission of new states , rather than the expansion of existing states. The U.S. Constitution was drafted at the 1787 Constitutional Convention to overcome the limitations of the Articles. It went into effect in 1789, creating a federal republic governed by three separate branches that together ensured a system of checks and balances . George Washington

10824-713: The development of self-governance, and the First Great Awakening , a series of Christian revivals , fueled colonial interest in religious liberty . For a century, the American colonists had been providing their own troops and materiel in conflicts with indigenous peoples allied with Britain's colonial rivals , especially France, and the Americans had begun to develop a sense of self-defense and self-reliance separate from Britain. The French and Indian War (1754–1763) took on new significance for all North American colonists after Parliament under William Pitt

10947-503: The eastern Tibet and northwestern Yunnan of China. Also there are some Tibetan Hindus who mainly live in China, India and Nepal. According to legend, the 28th king of Tibet, Thothori Nyantsen , dreamed of a sacred treasure falling from heaven, which contained a Buddhist sutra , mantras , and religious objects. However, because the Tibetan script had not been invented, the text could not be translated in writing and no one initially knew what

11070-580: The environment for labor unions to begin to flourish . This period eventually ended with the advent of the Progressive Era , which was characterized by significant reforms. Pro-American elements in Hawaii overthrew the Hawaiian monarchy ; the islands were annexed in 1898. That same year, Puerto Rico , the Philippines , and Guam were ceded to the U.S. by Spain after the latter's defeat in

11193-541: The federal government often applied policies of Indian removal or assimilation . The Trail of Tears (1830–1850) was a U.S. government policy that forcibly removed and displaced most Native Americans living east of the Mississippi River to lands far to the west. These and earlier organized displacements prompted a long series of American Indian Wars west of the Mississippi. The Republic of Texas

11316-544: The first major bend of the Yellow River where it changes course nearly 180 degrees and heads back towards Qinghai . Ruo'ergai has an alpine subarctic climate ( Köppen Dwc ), featuring very cold nights even in summertime, and very cold winters with extreme diurnal temperature ranges . Snow can fall any time of the year and usually does not melt until summer due to repeated nightly freezing even when maxima are above 0 °C (32 °F). Therefore, access to Ruo'ergai

11439-606: The first nuclear weapons and used them against the Japanese cities of Hiroshima and Nagasaki in August 1945, ending the war. The United States was one of the " Four Policemen " who met to plan the post-war world , alongside the United Kingdom , Soviet Union , and China . The U.S. emerged relatively unscathed from the war, with even greater economic power and international political influence . After World War II,

11562-428: The forearm blood flow of low-altitude dwellers. Tibetans inherited this adaptation due to selected genes associated with Denisovan admixture among Asian populations, highlighting how different environments trigger different selective pressures. Nitric oxide causes dilation of blood vessels, allowing blood to flow more freely to the extremities and aids the release of oxygen to tissues. According to Tibetan mythology ,

11685-616: The harsh geography of Tibet has produced an adaptive culture of Tibetan medicine and cuisine . As of the 2014 census, there are about 6 million Tibetans living in the Tibet Autonomous Region and the 10 Tibetan autonomous prefectures in the provinces of Gansu , Qinghai , Sichuan , and Yunnan . The SIL Ethnologue in 2009 documents an additional 189,000 Tibetic speakers living in India , 5,280 in Nepal and 4,800 in Bhutan . The Central Tibetan Administration 's (CTA) Green Book (of

11808-463: The integration of Army National Guard units and personnel into the U.S. Army and (since 1947) the U.S. Air Force. There are about 18,000 U.S. police agencies from local to national level in the United States. Law in the United States is mainly enforced by local police departments and sheriff departments in their municipal or county jurisdictions. The state police departments have authority in their respective state , and federal agencies such as

11931-482: The military draft (leading to the end of conscription in 1973) and wide opposition to U.S. intervention in Vietnam (with the U.S. totally withdrawing in 1975). A societal shift in the roles of women was significantly responsible for the large increase in female paid labor participation during the 1970s, and by 1985 the majority of American women aged 16 and older were employed. The late 1980s and early 1990s saw

12054-612: The most attractive to the population are the most vulnerable. The U.S. is one of 17 megadiverse countries containing large numbers of endemic species : about 17,000 species of vascular plants occur in the contiguous United States and Alaska, and over 1,800 species of flowering plants are found in Hawaii, few of which occur on the mainland. The United States is home to 428 mammal species, 784 birds, 311 reptiles, 295 amphibians , and around 91,000 insect species. There are 63 national parks , and hundreds of other federally managed parks, forests, and wilderness areas , managed by

12177-662: The most violent, the California genocide of thousands of Native inhabitants, lasted into the early 1870s, just as additional western territories and states were created. During the colonial period, slavery had been legal in the American colonies , though the practice began to be significantly questioned during the American Revolution. States in the North enacted abolition laws , though support for slavery strengthened in Southern states , as inventions such as

12300-660: The north and Mexico to the south, with the states of Alaska to the northwest and the archipelagic Hawaii in the Pacific Ocean . The United States also asserts sovereignty over five major island territories and various uninhabited islands . The country has the world's third-largest land area , largest exclusive economic zone , and third-largest population , exceeding 334 million. Its three largest metropolitan areas are New York , Los Angeles , and Chicago , and its three most populous states are California , Texas , and Florida . Paleo-Indians migrated across

12423-587: The northeast cluster, a southern plateau ancestry associated with the south-southwest cluster, and a southeastern plateau ancestry associated with the southeast-central cluster". There was limited contact with Central Asian populations, inline with historical events, evident in mutual geneflow. The expansion of the Tibetan Empire may have left genetic traces in surrounding populations. Genetic studies identified more than 30 genetic factors that make Tibetans' bodies well-suited for high-altitudes, including

12546-530: The number of Tibetan diaspora in India declined to 85,000. Tibetans are known as Bhotiyas in Nepal, where they are majority in regions such as Upper Mustang , Dolpo , Walung region and Limi and Muchu valleys. Nepal is also home to other Tibetic people such as the Sherpa , Hyolmo and Tamang . There are also more than 10,000 Tibetan refugees in Nepal. The Tibetic languages ( Tibetan : བོད་སྐད། ) are

12669-400: The origins of Tibetans are said to be rooted in the marriage of the monkey Pha Trelgen Changchup Sempa and rock ogress Ma Drag Sinmo. Most Tibetans generally observe Tibetan Buddhism or a collection of native traditions known as Bön (also absorbed into mainstream Tibetan Buddhism). There is a minority Tibetan Muslim population. There is also a small Tibetan Christian population in

12792-408: The policy of redlining later adopted by the federal Home Owners' Loan Corporation . An explosion of technological advancement accompanied by the exploitation of cheap immigrant labor led to rapid economic expansion during the late 19th and early 20th centuries , allowing the United States to outpace the economies of England, France, and Germany combined. This fostered the amassing of power by

12915-574: The primary colonial grievances was a denial of their rights as Englishmen , particularly the right to representation in the British government that taxed them . To demonstrate their dissatisfaction and resolve, the First Continental Congress met in 1774 and passed the Continental Association , a colonial boycott of British goods that proved effective. The British attempt to then disarm the colonists resulted in

13038-624: The region claimed by the CTA is more expansive and China more diminutive . Also, the Tibetan administration did not take a formal census of its territory in the 1950s; the numbers provided by the administration at the time were "based on informed guesswork". According to the Sixth National Population Census of the People's Republic of China (2010), there are 6,282,187 Tibetans nationwide: There are 2,716,388 people in

13161-596: The regions of Ladakh (Ladakhi and Balti ), Kinnaur district in Himachal Pradesh , Spiti valley , Uttarakhand ( Bhotiya ), Sikkim ( Bhutia ), and Arunachal Pradesh ( Khamba , Lhoba and Monpa people ). There are also nearly 100,000 Tibetans living in exile in India since 1959, the majority of them living in Tibetan enclaves such as Dharamshala and Bylakuppe . In 2011, the Indian government reported 150,000 Tibetan diaspora residing in India. In 2019,

13284-515: The rights of African Americans . National infrastructure, including transcontinental telegraph and railroads , spurred growth in the American frontier . From 1865 through 1917 an unprecedented stream of immigrants arrived in the United States, including 24.4 million from Europe. Most came through the port of New York City , and New York City and other large cities on the East Coast became home to large Jewish , Irish , and Italian populations, while many Germans and Central Europeans moved to

13407-614: The rocky Great Basin and Chihuahua , Sonoran , and Mojave deserts. In the northwest corner of Arizona , carved by the Colorado River over millions of years, is the Grand Canyon , a steep-sided canyon and popular tourist destination known for its overwhelming visual size and intricate, colorful landscape. The Sierra Nevada and Cascade mountain ranges run close to the Pacific coast . The lowest and highest points in

13530-573: The six service branches, which are made up of the U.S. Army , Marine Corps , Navy , Air Force , and Space Force . The Coast Guard is administered by the Department of Homeland Security in peacetime and can be transferred to the Department of the Navy in wartime. The United States spent $ 916 billion on its military in 2023, which is by far the largest amount of any country , making up 37% of global military spending and accounting for 3.4% of

13653-545: The sole authority of a state government. SDFs are authorized by state and federal law but are under the command of the state's governor . They are distinct from the state's National Guard units in that they cannot become federalized entities. A state's National Guard personnel, however, may be federalized under the National Defense Act Amendments of 1933 , which created the Guard and provides for

13776-543: The states are also represented by local elected governments , which are administrative divisions of the states. States are subdivided into counties or county equivalents , and further divided into municipalities . The District of Columbia is a federal district containing the U.S. capital, Washington, D.C. . The federal district is an administrative division of the federal government. Federally recognized tribes govern 326 Indian reservations . The United States has an established structure of foreign relations, and it has

13899-510: The structure and responsibilities of the national federal government and its relationship with the individual states. The U.S. Constitution is the world's oldest national constitution still in effect (from March 4, 1789). Composed of three branches, all headquartered in Washington, D.C., the federal government is the national government of the United States. It is regulated by a strong system of checks and balances . The three-branch system

14022-1048: The total population in Tibet Region, 24.44% of the total population of Qinghai and 1.86% of the total population in Sichuan. Of all Tibetans in China, 315,622 people live in cities, 923,177 in towns, and 5,043,388 people (80.3%) live in rural areas. According to the Seventh Census of 2020 , there are 7,060,700 Tibetans living within China. Of the resident population of the Tibet Autonomous Region, 3,204,700 were Tibetans and other ethnic minorities, of whom 3,137,900 were Tibetans, an increase of 421,500, or 15.52%, over 2010, with an average annual growth rate of 1.45%; 66,800 were other ethnic minorities, an increase of 26,300, or 64.95%, over 2010, with an average annual growth rate of 5.13%; and 6,680 were other ethnic minorities, an increase of 26,300, or 64.95%, over 2010, with an average annual growth rate of 5.13%. The average annual growth rate

14145-582: The world's fourth-longest river system , runs predominantly north–south through the heart of the country. The flat and fertile prairie of the Great Plains stretches to the west, interrupted by a highland region in the southeast. The Rocky Mountains , west of the Great Plains, extend north to south across the country, peaking at over 14,000 feet (4,300 m) in Colorado . Farther west are

14268-583: The world's second-largest diplomatic corps as of 2024 . It is a permanent member of the United Nations Security Council , and home to the United Nations headquarters . The United States is a member of the G7 , G20 , and OECD intergovernmental organizations. Almost all countries have embassies and many have consulates (official representatives) in the country. Likewise, nearly all countries host formal diplomatic missions with

14391-444: The world's oldest surviving federation, and its presidential system of national government has been adopted, in whole or in part, by many newly independent states worldwide following their decolonization . It is a liberal representative democracy "in which majority rule is tempered by minority rights protected by law ". The Constitution of the United States serves as the country's supreme legal document , also establishing

14514-553: The world's tornadoes occur in the country , mainly in Tornado Alley . Overall, the United States receives more high-impact extreme weather incidents than any other country. Extreme weather became more frequent in the U.S. in the 21st century, with three times the number of reported heat waves as in the 1960s. In the American Southwest , droughts became more persistent and more severe. The regions considered as

14637-575: Was annexed in 1845, and the 1846 Oregon Treaty led to U.S. control of the present-day American Northwest . Victory in the Mexican–American War resulted in the 1848 Mexican Cession of California, Nevada, Utah, and much of present-day Colorado and the American Southwest . The California gold rush of 1848–1849 spurred a huge migration of white settlers to the Pacific coast, leading to even more confrontations with Native populations. One of

14760-772: Was 5.13%. There are one region, ten prefectures, and two counties officially established by the government: the Tibet Autonomous Region (TAR), Qinghai Province ( Haibei Tibetan Autonomous Prefecture , Hainan Tibetan Autonomous Prefecture , Huangnan Tibetan Autonomous Prefecture , Guoluo Tibetan Autonomous Prefecture , Yushu Tibetan Autonomous Prefecture , and Haiximenggu Tibetan Autonomous Prefecture ), Sichuan Province ( Aba Tibetan and Qiang Autonomous Prefecture , Ganz Tibetan Autonomous Prefecture , and Muji Tibetan Autonomous County ), Gansu Province ( Gannan Tibetan Autonomous Prefecture and Tianzhu Tibetan Autonomous Prefecture ), and Yunnan Province ( Diqing Tibetan Autonomous Prefecture ). In India Tibetic people are found in

14883-759: Was adopted on July 4, 1776. The political values of the American Revolution included liberty , inalienable individual rights ; and the sovereignty of the people ; supporting republicanism and rejecting monarchy , aristocracy , and all hereditary political power; civic virtue ; and vilification of political corruption . The Founding Fathers of the United States , who included Washington, Jefferson, John Adams , Benjamin Franklin , Alexander Hamilton , John Jay , James Madison , Thomas Paine , and many others, were inspired by Greco-Roman , Renaissance , and Enlightenment philosophies and ideas. The Articles of Confederation were ratified in 1781 and established

15006-583: Was elected the country's first president under the Constitution, and the Bill of Rights was adopted in 1791 to allay skeptics' concerns about the power of the more centralized government. His resignation as commander-in-chief after the Revolutionary War and his later refusal to run for a third term as the country's first president established a precedent for the supremacy of civil authority in

15129-479: Was written in it. Buddhism did not take root in Tibet until the reign of Songtsän Gampo , who married two Buddhist princesses, Bhrikuti of Nepal and Wencheng of China. It then gained popularity when Padmasambhāva visited Tibet at the invitation of the 38th Tibetan king, Trisong Deutson . Today, one can see Tibetans placing Mani stones prominently in public places. Tibetan lamas , both Buddhist and Bön, play

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