A majestic forest tree, an American chestnut was typically 50 to 100 feet (15 to 30 meters) in height, but could grow as tall as 150 feet (45 meters) over its several-hundred-year ...

Bozeman re-signed with the Chargers on a two-year deal last offseason. Kirby Lee / Imagn Images Los Angeles Chargers center Bradley Bozeman announced his retirement on Monday in a post on Instagram.

If you look up invasive species in a textbook, there's a good chance you'll find a picture of a brown tree snake. Native to ...

For more than a century, scientists have sought to reconstruct human evolution using diverse lines of evidence, including fossils, genetic variation across populations and ancient DNA. Building on ...