Metal in ancient shipwrecks has value for both historians and scientists.
Polynesians beat 18th-century innovation by hundreds of years.
Long ago, life was nasty, brutal and short -- and well organized.
A tale of an Indonesian volcano, a monk, and the mass graves of London.
Appalachian cave art may explain Mound people's universe.
Changes in the environment likely made life too difficult for Peru's Moche.