@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/GsudqkINcl https://t.co/cAfhGL7jk3

@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/GsudqkINcl https://t.co/cAfhGL7jk3