19:21
Why are only China and India so populous?
18:46
"Aikido is a lie, right?" I seriously tested it with a junior professional wrestler.
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物理学者対談〜量子重力・ブラックホールを語る〜 PARTⅡ
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[Slow Explanation] Hibernation and Estivation: One of Biology's Greatest Mysteries [Evolution / S...
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