1. Launch a balloon with your own camera attached to it:
https://www.youtube.com/watch?v=UAifzh7_-cg
2. Sail around the world on your own.
3. Become an astronaut.
https://www.youtube.com/watch?v=UAifzh7_-cg
2. Sail around the world on your own.
3. Become an astronaut.
...but the curve is going the wrong way in that video!
http://i.imgur.com/LCkAMRG.png
The options were flat or spherical, now you've gone and complicated things by offering evidence for a concave earth.
I don't know but this made me laughed!
another theory will arise because of that video lol