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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!
By Mark Painter4.8
698698 ratings
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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