0 sats \ 1 reply \ @DesertDave 15h \ parent \ on: Have you ever completely changed your mind on something big? alter_native
How do we know if the earth is flat or round? A lot of pilots say it's flat. I have no way of knowing.
You do, in the exact same way firsts physicians did. The simplest first steps to garner that understanding were made by Eratostenes, and you can read his method.
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