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.
First artificial ink is still blue, but now known to emit near-infrared rays when irradiated with light.