Study: Enhanced look at intertwined evolutionary histories of polar and brown bears texasguardian.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from texasguardian.com Daily Mail and Mail on Sunday newspapers.
Rather than simple splitting events, the evolution of polar bears and brown bears are like those of humans, a tangled story of divergence and interbreeding.
Polar bears and brown bears were still mating with each other long after they had split into two distinct species, a new study has found led by scientists from University at Buffalo.