Fifty thousand years ago, North America was a land of giants. Mammoths, mastodons, saber-toothed tigers, and enormous wolves roamed the continent, sharing the landscape with towering camels, giant beavers, and immense ground sloths. But as the Last Ice A… Read on blog or Reader ScienceBlog.com Read on blog or Reader Clues to mysterious disappearance of North America's large mammals 50,000 years ago found within ancient bone collagen Frontiers In May 31 Fifty thousand years ago, North America was a land of giants. Mammoths, mastodons, saber-toothed tigers, and enormous wolves roamed the continent, sharing the landscape with towering camels, giant beavers, and immense ground sloths. But as the Last Ice Age drew to a close, most of these magnificent creatures vanished, leaving behind a mystery that has […] Continue reading

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