A set of footprints found in the east African country of Tanzania from millions of years ago have long been thought to belong to a bear, but researchers have discovered they actually belonged to an ancient human species, suggesting there may have been more than one early human species existing at the same time.
McNutt went to a local bear sanctuary and had bears there make prints so she could compare them with the ones from Laetoli site A. The two didn't match. "That's how we know for sure that, one way or another, this belongs to an individual within our lineage," McNutt said. The team of international researchers studying the prints with McNutt came to the conclusion that although the prints are wider than the ones at site A, they most likely came from a juvenile hominin, and even full grown adults were not as big as most humans today.
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