How Eratosthenes measured the size of Earth: the Cosmos episode where Carl Sagan explains how the ancient Greeks, using reason and math, figured out the Earth isn’t flat, over 2,000 years ago https://t.co/CP7SQeI7r9 pic.twitter.com/sqkF3s5V4q
— Massimo (@Rainmaker1973) October 24, 2018
via Twitter https://twitter.com/Rainmaker1973
October 24, 2018 at 06:57PM
No comments:
Post a Comment