During the last Ice Age, shaggy mammoths, woolly rhinos and bison lumbered across northern Siberia. Then, about 10,000 years ago — in the span of a geological heartbeat, or a few hundred years — the last of them disappeared.
Many scientists believe a dramatic shift in climate drove these giant grazers to extinction.
But two scientists who live year-round in the frigid Siberian plains say that man _either for food, fuel or fun — hunted the animals to extinction.
Paleontologists have been squabbling for decades over how these animals met their sudden demise. The most persuasive theories say it was humanity and nature: Dramatically warming temperatures caused a changing habitat and brought a migration of men armed with deep-piercing spears.
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