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Do you ever think about the risks the Apollo astronauts took in the name of science? It's amazing. Actually, the astronauts were at risk of something many people don't know about: the Sun.
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While our understanding of things like epilepsy, the stars, and the shape of the Earth has changed dramatically over the centuries, ancient cultures confronted the same universe as we do. Even though their ideas about that universe are often very different from ours, there are also countless insights hidden in scientific writings from over 2,000 years ago.