@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/0GdQLZaofU https://t.co/XFF3pjzeb0

@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/0GdQLZaofU https://t.co/XFF3pjzeb0