The 6 Craziest Extinctions Ever
The earth has been through some major changes! Animals we wish still existed: http://youtu.be/wutj5z1lElU SUBSCRIBE (it's free): http://bit.ly/10kWnZ7 GET THE BOOK: http://asapscience.com/book/...
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Over 99% of the animal species that have ever lived are now extinct. And sometimes, an event occurs causing changes so drastic that most species are completely wiped out within a short period of time. So here are the 5 most incredible mass extinctions ever to occur, and a look at whether the 6th might be happening right now. 440 million years ago was the The Ordovician extinction. At that time, most creatures swam or crawled in shallow seas. As newly created volcanic rock was worn down by water and wind, it reacted with CO2 and absorbed it. As a result, carbon dioxide levels dropped, temperatures fell and water got locked away as ice. This caused ocean levels to drop and shallow seas to drain and after several cycles of growing and shrinking glaciers, abo...
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Over 99% of the animal species that have ever lived are now extinct. And sometimes, an event occurs causing changes so drastic that most species are completely wiped out within a short period of time. So here are the 5 most incredible mass extinctions ever to occur, and a look at whether the 6th might be happening right now. 440 million years ago was the The Ordovician extinction. At that time, most creatures swam or crawled in shallow seas. As newly created volcanic rock was worn down by water and wind, it reacted with CO2 and absorbed it. As a result, carbon dioxide levels dropped, temperatures fell and water got locked away as ice. This caused ocean levels to drop and shallow seas to drain and after several cycles of growing and shrinking glaciers, abo...
