I would love to hear more about these "first experiments to measure the size of the earth" coz many people have failed recently to find even an inch of curvature, anywhere....

Fluid dynamics of water indicate that bendy oceans can't be a real thing. Clock Towers can be seen from 100's of miles, lighthouses too. White cliffs of Dover can be seen from Calais, France... Etc. I've never heard of an experiment to measure the earth, so I am intrigued to know more, thank you.

(I truly appreciate your time and typing... Please be aware your CAPS LOCK seems to get stuck now and then tho :)