Another crater,another extinction? (Introduction)
In Russia 33 million years ago:-http://www.livescience.com/46312-popigai-crater-linked-eocene-mass-extinction.html?cmpid=557686
In Russia 33 million years ago:-http://www.livescience.com/46312-popigai-crater-linked-eocene-mass-extinction.html?cmpid=557686