First, a refresher course for those who’ve forgotten their great epochs: Ordovician, Devonian, Permian, Triassic, and Cretaceous. These milestones note the “Big Five” mass extinctions. Now add a sixth: Anthropocene (anthro for human).
Writer Andy Soos explains how some scientists are qualifying the nomenclature: “… in just two centuries, humans have wrought such vast and unprecedented changes to our world that we actually might be ushering in a new geological time interval which will alter the planet for millions of years.”
Read more here.