Microfossils found in China have revealed what could be our earliest known ancestor on the tree of life, researchers say. But don't go looking for a resemblance. Saccorhytus, which looks a little like the "chestburster" from "Alien," was a tiny, bag-like sea creature that lived 540 million years ago.


원문출처 : http://www.cnn.com/2017/01/30/health/earliest-human-ancestor-deuterostome-saccorhytus-history-study/index.html