The water you drink has most likely been drunk before — by a person, by a person thousands of years ago or even by a dinosaur ...

Researchers analyzed saliva the nocturnal mammals leave behind when sipping nectar from plants and residential hummingbird feeders.

Donald Trump's declaration of a national energy emergency wasn't shocking. What was, though, was that his order singled out ...

President Donald Trump has nominated Colorado’s Kathleen Sgamma, head of Western Energy Alliance, an oil and gas trade group, ...