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Carl Sagan - Cosmos - Eratosthenes.Carl Sagan talks about Eratosthenes, the man who estimated the circumference of the earth using just a stick, eyes, feet and his brains, debunking flat earthers over 2,200 years ago.
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In one of the dopest displays of critical thinking in history, Eratosthenes estimated the circumference of the Earth. All he had was a pole, the sun, knowledge of a famous well in Egypt, and potentially money to pay someone to walk the distance between tw
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The legendary Carl Sagan brilliantly demonstrates how Eratosthenes proved a spherical Earth. Hard to believe that some people still deny this 2200 years later.
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Adam Savage walks through two spectacular examples of profound scientific discoveries that came from simple, creative methods anyone could have followed -- Eratosthenes' calculation of the Earth's circumference around 200 BC and Hippolyte Fizeau's measure
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A most simple deduction made around 200 bc by the Astronomer Eratosthenes. A Globular spheroid is our home ^^ Using the simple concept that shadows must be the same length on a flat surface, but different when on a curved surface, Eratosthenes was able to
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Ever wondered just how small (or big) you are compared to everything else in our galaxy? Watch more: What Would It Take For Earth To Explode? ►► https://www.youtube.com/watch?v=aJJ7_ikTEYg&t=0s&list=PL8L0MzSk_V6JtEDRfRMyb6rFd1acqYSlO&index=10 Subscribe: h
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