AdvertisementDrawing A Line In The Mud: Scientists Debate When 'Age Of Humans' BeganMarch 17, 2021Rebecca HersherfacebookEmailA portion of Australia's Great Barrier Reef photographed from the International Space Station. The Flinders Reef area of the Great Barrier Reef is one of 11 sites around the world where scientists are looking for decisive geological evidence of a new epoch called the anthropocene. (NASA)