56143323 story What Killed the Great Beasts of North America? 214 Posted by Unknown Lamer on Wednesday January 29, 2014 @01:25PM from the mostly-spears dept. sciencehabit writes "Until about 11,000 years ago, mammoths, giant beavers, and other massive mammals roamed North America. Many researchers have blamed their demise on incoming Paleoindians, the first Americans, who allegedly hunted them to extinction. But a new study points to climate and environmental changes instead. The findings could have implications for conservation strategies, including controversial proposals for 'rewilding' lions and elephants into North America."