United States

The United States of America, commonly known as the United States or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, 326 Indian reservations, and some minor possessions. At 3.8 million square miles, it is the world's third- or fourth-largest country by geographic area. The United States shares significant land borders with Canada to the north and Mexico to the south as well as limited maritime borders with the Bahamas, Cuba, and Russia. With a population of more than 331 million people, it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City. Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago, and European colonization began in the 16th century. The United States emerged from the thirteen British colonies established along the East Coast.

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United States sees disproportionate increase in body mass index rates of more than 60

United States detects an unknown object disconnecting from a Russian satellite - Militarnyi

The United States’ oldest known rock has existed for at least 3.6 billion years

Climate change is officially the leading threat to imperiled species in the United States

Introduced trees are becoming more common in the eastern United States, while native diversity declines

Introduced trees are becoming more common in the eastern United States, while native diversity declines - EurekAlert!

The United States can no longer keep tabs on drug-resistant gonorrhea. Among the Centers for Disease Control and Prevention employees fired on Tuesday were 77 scientists who, among other work, gathered samples of gonorrhea and other S.T.I.s from labs nationwide.

Avoidable deaths are on the rise in the United States, yet falling in many peer nations

'Doomsday Clock' and patterns of mortality and mental health in the United States

Butterfly populations are plummeting across the United States

Despite high employment rates, Black immigrants in the United States more likely to be uninsured, USC study shows - EurekAlert

United States dementia cases estimated to double by 2060

Obesity affects a staggering 40 percent of adults and 20 percent of children in the United States. Researchers have discovered a previously unknown population of neurons in the hypothalamus that regulate food intake and could be a promising new target for obesity drugs.

United States and China renew science pact despite rising tensions

The first case of clade I mpox in the United States has been confirmed

Trust in scientists starts to recover in the United States at last — but barely

United States Welcomes Estonia’s Signing of the Artemis Accords

Quickly Spreading: Scientists Discover Mysterious New Flatworm in the United States

Mortality caused by tropical cyclones in the United States

SNMMI Radiopharmaceutical Therapy Centers of Excellence expand across United States and Canada - EurekAlert