Astronomers have discovered a likely explanation for a fracture in a huge cosmic "bone" in the Milky Way galaxy, using NASA's Chandra X-ray Observatory and radio telescopes.

Archaeologists recently unearthed a bone projectile point someone dropped on a cave floor between 70,000 and 80,000 years ago ...

Why do some ancient animals become fossils while others disappear without a trace? A new study from the University of ...