Over a decade after Homo naledi fossils were discovered in a South African cave system, researchers have uncovered a new clue—they may have all been female. An analysis of proteins in tooth enamel found that all 20 appear to be missing their Y chromosomes:

National Geographic @NatGeo ·
Over a decade after Homo naledi fossils were discovered in a South African cave system, researchers…

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    Nat Geo Explorer Rob G. Green spent three weeks tracking clues with two forest rangers and three fellow Nat Geo Explorers to photograph this giant panda. After placing a camera tr…

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    Nat Geo Explorer Rob G. Green spent three weeks tracking clues with two forest…
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