55percent_Unicorn t1_j2bcixd wrote
Reply to comment by B-F-A-K in eli5 How does measuring area in square miles work? If you have very mountainous terrain, does that increase the area compared to somewhere that is very flat? by bluejeans90210
He also made a somewhat epic video on the topic. I can't actually remember which came out first, but they were basically simultaneous to a first approximation.
Also, is this your card?
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