AKSHUALLY comparing shadows across the Earth is a great way to prove it is in fact an oblate spheroid. The Greek mathematician Eratosthenes used shadows to calculate the size of the Earth over 2000 years ago and he got pretty damn close. He didn’t need to prove the Earth was round, because people weren’t idiots like some are these days.
AKSHUALLY comparing shadows across the Earth is a great way to prove it is in fact an oblate spheroid. The Greek mathematician Eratosthenes used shadows to calculate the size of the Earth over 2000 years ago and he got pretty damn close. He didn’t need to prove the Earth was round, because people weren’t idiots like some are these days.
Isn’t he the guy that used a sieve to encrypt web traffic?