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The top documents tagged [buried crater]
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NSCI 314 LIFE IN THE COSMOS 19 - LIFETIMES OF TECHNOLOGICAL CIVILIZATIONS Dr. Karen Kolehmainen Department of Physics, CSUSB karen
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Apophis and the Keyhole Apophis and the Keyhole SOLAR SYSTEM sun planets, dwarf planets, and moons asteroids and comets dust lots of space between everything
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