How Ancient Coral Revealed the Changing Length of a Year
The lines on fossilized specimens show that millions of years ago, it took 420 days for the Earth to complete an orbit around the sun.
Continue Reading http://www.theatlantic.comThe lines on fossilized specimens show that millions of years ago, it took 420 days for the Earth to complete an orbit around the sun.
Continue Reading http://www.theatlantic.com
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