This post is locked. You won't be able to comment. 310 () posted 2 years ago by PepeSee 2 years ago by PepeSee +316 / -6 511 comments share 511 comments share save hide report block hide replies
I can 'observe' a boat on the water on a clear day miles out..see more of the actual boat when you view from a higher location than from a lower location on the shoreline. That's pretty 'observable' proof right there.