Mammoths moved 'out of America' :

Scientists have discovered that the last Siberian woolly mammoths may have originated in North America.
Their research in the journal Current Biology represents the largest study of ancient woolly mammoth DNA.
The scientists also question the direct role of climate change in the eventual demise of these large beasts.
They believe that woolly mammoths survived through the period when the ice sheets were at their maximum, while other Ice Age mammals "crashed out".