The airspace above Reagan National Airport, where a commercial plane collided with an Army helicopter this week, has become increasingly congested with air traffic, including helicopters.

Rwandan-backed M23 rebels say they are now in control of the key eastern Congolese city of Goma. Their fighters continue to ...

Research and basic information on subjects ranging from tuberculosis surveillance to adolescent health disappeared from federal health agency websites.

Federal authorities have restricted helicopter flights near Ronald Reagan Washington National Airport. The move comes days ...

A documentary deconstructs the true crime genre, an obsessive worms his way into a pop star's entourage, and more standouts ...

A series of orders from the Trump administration have the potential to disrupt the delivery of life-saving medications to HIV ...

The Chinese chatbot took the world by storm and rattled stock markets. But lost in all the attention was a focus on how the ...

Winters are getting warmer and shorter as the climate changes. That's helping rat populations grow in several U.S. cities.

Costco is raising pay for most workers as a Friday night deadline looms on a new contract with its unionized employees.

Costco is raising pay for most workers as Friday night deadline looms on a new contract with its unionized employees.

The National Science Foundation's funding freeze, and wider confusion about the status and future of science funding, is ...

President Trump renewed his threat to impose 25% tariffs on imports from Mexico and Canada as early as this weekend. The move could raise prices on everything from gasoline to guacamole.