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Message: <blockquote data-quote="ArchfiendBobbie" data-source="post: 6992075" data-attributes="member: 6867728">One of the ways we know the Earth is round is because all measurements attempting to approximate the Earth's shape, going back far enough they may even predate writing in some cultures, show it to be round. I think it was by the era of the Ancient Greeks that we had enough of an idea of Pi to approximate the Earth's size. Many early estimates were not that far off from modern knowledge.Now, I'm leaving out the physics I've seen bantered around saying the Earth is flat and that it's only round as far as we can tell because of the curvature of space. I don't understand the terms they use and the math leaves me seeking the nearest exit. But you might have fun implementing a similar concept just to mess with players.Unless you're going for that mindscrew concept I just brought up, one thing you'll have to keep in mind is that by the typical medieval-like era, anyone educated is probably going to not only know the shape of the world, but have a pretty accurate idea of how big it is. Magic just means their accuracy might be even higher and they also might have pretty accurate world maps.</blockquote>