One of my guilty pleasures on YouTube is flat earth debunkers (e.g. SciManDan, MC Toon, Wolfie6020, Dave McKeegan and his chill AF springer spaniel, et al). I get to see all the absolutely nutso flat earth “proofs” without actually giving them any monetized views, AND I get to see those “proofs” expertly and often humourously dismantled.
I’ve legitimately learned a bunch about optics, gravity, orbital mechanics, tidal locking, etc.
For example, did you know it’s possible to prove the Earth is an oblate spheroid from 19th century survey data? Well, it is: each of the thousands of triangles surveyed have internal angles that sum to a little more than 180°, which is only possible with geometry on a sphere.
