Oldie, but a goodie. Come spend a couple minutes with Carl Sagan as he explains how Eratosthenes figured out the circumference of the earth and that it truly was a sphere!
The pacing is a little slower than we're used to these days, but it's a relaxing five or so minutes. Rebel against the attention economy for a moment this Friday and indulge yourself.
yall ever do this in primary school? easily the coolest basic experiment out there
nah we never walked from one part of Egypt to the other sadly
:trump-anguish: SAD