3. 25 Facts About Geologic Time That Made Our Brains Hurt 4. How Do We Know? A Glimpse into Geologic Sleuthing 5. Our Fleeting Moment in Deep Time 6. Frequently Asked Questions What if we told you ...
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How the Ancient Greeks Knew the Earth Was Round
Carl Sagan honors ancient Greek thinkers who proved Earth is round using logic, shadows, and math. From Aristotle’s observations to Eratosthenes’ calculations, their insights shaped modern science.
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