Why did many species of mammals become extinct at the end of America's Ice Age, 13,000 years ago? The final film examines the evidence and looks at how the survivors have adapted to the altered landscape of North America - 21st century ...See moreWhy did many species of mammals become extinct at the end of America's Ice Age, 13,000 years ago? The final film examines the evidence and looks at how the survivors have adapted to the altered landscape of North America - 21st century mouse roam through downtown Anchorage while burrowing owls raise young in Silicon Valley.
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