Analysis of polar bear DNA shows they’re an ancient species with a…

A scan of polar bear DNA has shown that polar bears came into existence far earlier than previously assumed. Working with fossils alone, scientists had thought that polar bears, after intermingling with brown bears, made their first snowy white appearance anywhere between 60,000 to 600,000 years ago. But a genetic… » 7/24/12 1:20pm 7/24/12 1:20pm