>Why can't I see the other side? Why ships disappear over the horizon?Because light doesn't travel in straight line, it bends upward. Mainstream science knows about it, but they are very reluctant when it comes to sharing such discovery.
>http://www.sciencemag.org/news/2012/04/light-bends-itself>http://cerncourier.com/cws/article/cern/32506>https://physics.stackexchange.com/questions/368263/does-light-actually-travel-in-a-straight-