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@crashcourse1,707 videos20 yrs
100Kin 28d
7.72Min 28d
$7.2Kin 14d
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1:01Earthquake Resistant Buildings
0:54How did ocean invertebrates end up on Mt. Everest?!
1:06The Ring of Fire
0:25Let's Dig a Little Deeper
1:29This Is Your Last Chance!
