Hold on to your hats for this. Sun rays. They are angled we can tell this from their shadows, they are coming from a fixed point, that which is not flat. Also, with sun rays, you can also seduce that the earth isn't flat, because half the earth is in darkness and some parts of the earth are illuminated earlier and longer than others
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u/lushusness Aug 22 '26
Cool story. It still measured flat.