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Key Facts In This Video
There is 66 million years between humans and the T-Rex, but 83 million years between the T-Rex and Stegosaurus. 00:16
Only 58 years passed between the first time humans flew an aircraft and landing on the moon. 00:33
Those graduating high school in 2015 have never been alive without The Simpsons being on TV. 00:46
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