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Discovery
00:08:28
Maya Ruins of Copan, Honduras [Amazing Places 4K]
1,717 观看
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00:03:52
Neil deGrasse Tyson: Can You Own Land on Mars?
3,231 观看
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00:02:56
Bill Nye: Cleaning the Environment with GMOs
4,617 观看
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00:05:28
Neil deGrasse Tyson Explains the Cosmic Ballet of the Earth and Moon
2,005 观看
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00:03:58
How democratic is your country?
2,587 观看
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00:03:21
How Fast is the Universe Expanding?
4,708 观看
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00:04:27
Why Does The Moon Look So Big Tonight?
2,988 观看
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00:05:17
How Dense is the Asteroid Belt?
507 观看
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00:01:51
Why Does Screaming Get Your Attention So Quickly?
4,529 观看
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00:05:29
How Can Black Holes Shine?
550 观看
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00:04:28
How Quickly Does A Supernova Happen? The Stunning Speed of a Core Collapse Supernova
4,439 观看
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00:02:11
This House Was Built In Just 36 Hours | Impossible Engineering
2,001 观看
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00:02:21
What Strange Power Source Makes Jupiter So Hot?
4,518 观看
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00:03:57
How Did Earth Get Its Water?
4,042 观看
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00:04:00
Juno Arriving at Jupiter!
1,026 观看
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00:15:21
The Extraordinary Wartime Contributions of the U.S. Coast Guard Auxiliary
4,483 观看
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00:14:01
History of America s Forgotten Mints
216 观看
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00:12:37
The Extraordinary Voyage of the Polish Submarine Orzeł
3,116 观看
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00:05:40
History of the Toga and the "Gens Togata"
1,428 观看
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00:12:41
Escape Attempts from "The Rock" and the 1946 Battle of Alcatraz
2,181 观看
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Showing 635 out of 2848
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