News tagged with united states

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Call for circumcision gets a boost

In the United States the rate of circumcision in men has increased to 81% over the past decade. In an important new study just published in advance in Mayo Clinic Proceedings authors from Australia and the United States have s ...

Apr 02, 2014
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New forms of racism arise in science research

Advances in genetic sequencing are giving rise to a new era of scientific racism, despite decades of efforts to reverse attitudes used to justify the slave trade and Nazi theology, experts said on Friday.

Feb 15, 2014
popularity 2.9 / 5 (35) | comments 13

Missing sleep may hurt your memory

Lack of sleep, already considered a public health epidemic, can also lead to errors in memory, finds a new study by researchers at Michigan State University and the University of California, Irvine.

Jul 21, 2014
popularity 4.6 / 5 (14) | comments 3

Keep your heart healthy

(HealthDay)—Here's the bad news: Heart disease is the leading cause of death in the United States, and 49 percent of adults have at least one risk factor for the disease. But the good news is that there ...

Mar 16, 2014
popularity 4.7 / 5 (6) | comments 0

Health survey ranks U.S. last among rich peers

For the fifth time in a decade, the United States is the sick man of the rich world. But recent health reforms and increased health technology spending may provide a cure in the coming years.

Jun 17, 2014
popularity 4 / 5 (4) | comments 0

United States

The United States of America (commonly referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its 48 contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to its east and Russia to the west across the Bering Strait. The state of Hawaii is an archipelago in the mid-Pacific. The country also possesses several territories, or insular areas, in the Caribbean and Pacific.

At 3.79 million square miles (9.83 million km2) and with about 306 million people, the United States is the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries. The U.S. economy is the largest national economy in the world, with an estimated 2008 gross domestic product (GDP) of US $14.3 trillion (23% of the world total based on nominal GDP and almost 21% at purchasing power parity).

The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard. On July 4, 1776, they issued the Declaration of Independence, which proclaimed their independence from Great Britain and their formation of a cooperative union. The rebellious states defeated Great Britain in the American Revolutionary War, the first successful colonial war of independence. The Philadelphia Convention adopted the current United States Constitution on September 17, 1787; its ratification the following year made the states part of a single republic with a strong central government. The Bill of Rights, comprising ten constitutional amendments guaranteeing many fundamental civil rights and freedoms, was ratified in 1791.

In the 19th century, the United States acquired land from France, Spain, the United Kingdom, Mexico, and Russia, and annexed the Republic of Texas and the Republic of Hawaii. Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery provoked the American Civil War of the 1860s. The North's victory prevented a permanent split of the country and led to the end of legal slavery in the United States. By the 1870s, the national economy was the world's largest. The Spanish–American War and World War I confirmed the country's status as a military power. In 1945, the United States emerged from World War II as the first country with nuclear weapons, a permanent member of the United Nations Security Council, and a founding member of NATO. The end of the Cold War and the dissolution of the Soviet Union left the United States as the sole superpower. The country accounts for approximately 50% of global military spending and is a leading economic, political, and cultural force in the world.

This text uses material from Wikipedia licensed under CC BY-SA