Your Comments On...

Gems Point to Comet as Answer to Ancient Riddle

Something dramatic happened about 12,900 years ago, and the continent of North America was never the same. A thriving culture of Paleo-Americans, known as the Clovis people, vanished seemingly overnight. Gone, too, were most of the largest animals: horses, camels, lions, mammoths, mastodons,...
 - 

By Joel Achenbach