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'Clinging on for grim death': Fossils show ancient animals might have caused a mass extinction
Washington Post For markers of a mass extinction, the fossils dug up from the Namibian soil are not very impressive. The few animals caught in the rock are ribbon-shaped and worm-like. Many are nothing but impressions in 540-million-year-old sea bed muck, tunnels left ... The First Known Extinction Event May Have Been Caused by Early Animals Early animals might have caused a mass extinction event, says new evidence First Mass Extinction Event Caused by Arrival of Animals |
Monday, August 1, 2016
'Clinging on for grim death': Fossils show ancient animals might have caused a mass extinction - Washington Post
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