Skeptophilia
Fighting Gullibility with Sarcasm, 6 days a week
Showing posts with label
planetary rings
.
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Showing posts with label
planetary rings
.
Show all posts
Tuesday, September 17, 2024
A circle of light
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The Ordovician Period was a strange time in Earth's (pre)history. It lasted a little over forty million years, from about 485 million ye...
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