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ZME Science on MSNThis massive circular structure is made entirely of mammoth bones and skulls. DNA now offers clues about how Ice Age hunters built itSomewhere in the frozen plains of southwestern Russia, a 40-foot circle of mammoth bones and tusks has stood for over 24,000 ...
The magazine thanks The Rockefeller Foundation and members of the National Geographic Society for their generous support of this series of articles.
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