Mass Extinctions On Earth
By Jeremy Hsu 02 September 2010 Before ancient megafauna went extinct mastodons kept broad-leaved vegetation such as black ash trees. In the last five hundred million years the following five mass extinctions have taken place. Earth Will Take 10m Years To Recover From Climate Change Mass Extinction Study Back Page Observerbd Com The earth has undergone numerous mass extinctions since th. Mass extinctions on earth . Largest Mass Extinction In The History Of The Earth Linked To. But in fact the Earth has undergone numerous mass extinctions since the first bacterial life evolved about three billion years ago. Most peoples knowledge of mass extinctions begins and ends with the KT Extinction Event that killed the dinosaurs 65 million years ago. These five mass extinctions include the Ordovician Mass Extinction Devonian Mass Extinction Permian Mass Extinction Triassic-Jurassic Mass Extinction and Cretaceous-Tertiary or the K-T Mass Extinction. Here we go again. Siberia and the r...