Personally, I have to use calculations for spatial navigation that use a sphere as a constant. I have been up to 55k feet and have seen the curve of the earth. I can look across a vast ocean and find the horizon when deep sea fishing. I reject the flat earth theory based on sound mathematics and personal observation.
Personally, I have to use calculations for spatial navigation that use a sphere as a constant. I have been up to 55k feet and have seen the curve of the earth. I can look across a vast ocean and find the horizon when deep sea fishing. I reject the flat earth theory based on sound mathematics and personal observation.