@CNN: A newly discovered fossil site in China that dates back 518 million years contains more than 50% previously unknown species, according to a new study https://t.co/HRDApZs73g https://t.co/nC1fw9lycd

@CNN: A newly discovered fossil site in China that dates back 518 million years contains more than 50% previously unknown species, according to a new study https://t.co/HRDApZs73g https://t.co/nC1fw9lycd