The History of the Twentieth Century
009 Dark Clouds
Nov 8, 2015 · 37 min · Season 1 · Episode 9 · 36.0 MB
0:00-37:29
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What are cathode rays? X-rays? Radioactivity? How old is the Earth? Inquiring minds want to know. Also, in an age when only men can vote, the greatest scientist of the time is a woman. And Polish. Take that, haters!
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