Oldest Primate Finds Its Place on the Tree of Life

This 55-million-year-old pint-sized primate was a leaper and creeper. 

If members of Archicebus achilles were alive today, they would fit in the palm of your hand. But the little creatures lived 55 million years ago. In June, paleomammalogist Xijun Ni and his team presented the new species. “Archie,” as it’s dubbed by some, is the oldest primate skeleton to date.

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