He and his research team went on to uncover bones from 15 separate skeletons, dating from the time humans first spread across Africa.
These remains ranged from infants to elderly adults.
It soon became clear, however, that the bones were not human, and belonged to a totally new species.
Homo naledi would have appeared like a human rom a distance.
However, on closer inspection, their proportions would be clearly very different: they were very short and had smaller heads and narrower shoulders, with completely different facial features.
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