The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Polio, a disease that can cause lifelong paralysis, has been eliminated from the U.S. Experts fear a resurgence if lifesaving ...

The accident that resulted in a commercial airplane crashing into the Potomac yesterday will require air safety investigators ...

Observatories in Chile’s Atacama Desert, including the world’s largest optical telescope, could be blinded by light pollution ...

These caterpillars carry a toxic chemical cocktail and Inquisition-like delivery implements— and their geographic range is ...

“To jump on the water surface, you have to have your legs retracted and ready to push down again by the time you’re ...

In honor of the Year of the Snake, let’s appreciate the strange anatomy and evolution of these slithery reptiles ...

The state of Alaska requested the name change in 1975, but the Board on Geographic Names didn’t take action. Members of the ...

Most grocery stores seem to offer endless options in their aisles, which are full of cereals, pastas and baked goods ...

From Robert F. Kennedy, Jr.’s views on vaccines to Medicaid, here are some ways his nomination for head of the Department of ...

Helping people remain healthy and fit for as long as possible will be crucial as populations around the world get older.

The Trump administration has ordered a halt to “all federal financial assistance,” covering areas from domestic ...