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aikohualda said:
GProgrammer said:

Incorrect, People have known the world is a sphere from the greek times

people known the world is a sphere from the greek times... scientists from the greek times... still scientists

 

so how can he be incorrect? 

He's saying scientists used to think the world was flat, I'm saying scientists have known the world is a sphere since at least 2500 years.

The guy was repeating an often stated myth that scientists once thought the world was flat, read this

https://en.wikipedia.org/wiki/Myth_of_the_flat_Earth