In TP they talk about earths history from what I can remember there are two main events that shaped earth, one was what killed the dinosaurs and one that killed all the people, this documentary believe it or not talks about two huge asteroids that have hit earth and they have proof there we two big events....
http://topdocumentaryfilms.com/what-killed-dinosaurs/
Earth's history and natural disasters
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Earth's history and natural disasters
By their deeds shall you know them.
J.C
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