Carl Sagan The Planets 1977 RI Christmas Lectures (Part 4 4/6)
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Added: 3 years ago
From: venompangx
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  • Alot of this stuff obviously was known for some time even during the lecture not including how long ago tis lecture was so we know a great deal especially through people like him about the Solar System.

    RJL738 11 months ago

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