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Animals stock up on
and hibernate for the winter. They escape the
and cold in a cave or hole. Scientists think early
may also have hibernated. The scientists looked at the bones from our
who lived 430,000 years ago. The bones were found in Spain. The scientists are
in studying ancient bones. They say that cuts and other signs of
on the bones are
to those on bones of animals who hibernate. They also say that early humans may have hibernated to escape the
cold. Winters were much colder
of thousands of
ago.
