Hello, In my country there is this growing Flat Earth movement akin to religious fundamentalism. No matter what you throw at them, they simply ignore it. There is even a big group on Facebook of about 5,000 users. I recently joined there for fun. First I thought they were joking, but everybody seems dead serious about it. I nearly got kicked out because my profile photo shows a large armillary sundial which they consider to be a globe.... So preposterous! :)
So I recently wondered: can a sundial can be used to prove the Earth is round? And what would be the simplest gnomonic proof for this? Dan Uza
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
