https://aeon.co/videos/how-an-ancient-polymath-first-calculated-earths-size-as-… Created Thu, 30/03/2023 - 21:01 Updated Thu, 30/03/2023 - 21:01 Carl Sagan explains how, with just ‘sticks, eyes, feet and brains’, an ancient Greek polymath first calculated Earth’s size - by Aeon Video Watch at Aeon
