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Science & Technology
Mammoths vs. Mastodons: what's the criteria for de-extinction?
lesson duration 03:58
462,224 views
3,196,092 views
2,400,374 views
717,377 views
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Earth and Space Science
Could human civilization spread across the whole galaxy?
lesson duration 04:34
654,445 views
742,255 views
9,310,563 views
Earth and Space Science
Should we be looking for life elsewhere in the universe?
lesson duration 04:36
606,645 views
1,187,694 views
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616,174 views
37,652 views