This thread is stll alive?  Nomad you can't be real.   You know better, don't you?

Nomad tell me,  why is it summer in December where I live whereas in North America it is winter?   That is, the days are longer  now and get short during July.   It is the opposite in North America.   Why?

Explain to me why the Orion constellation is upside down now since I moved from Canada?  Was my move such a disruptive activity that the cosmos itself was upset?  Observe it.   Is it upside down?

Lastly explain to me why I cannot see Everest if it is the highest point of the Earth?

Science can start with a flat world view but in light of this gross evidence, or more subtle evidence when distances are much smaller than 10000 km,  we reject that and come to another theory that explains these anomalies. That is science.

A circle drawn in a 24 Mpx image will appear as a straight line when you zoom in enough. So a germ on a basketball experiences no detectable curvature.