The shape of Earth

[BrianSoddingBoru4]

Ah, what a big fat nonanswer. He is actually comparing the biggest thing in the world, Mount Everest, to a cockroach.
If the world was flat you could see mountains like Mount Everest up in the sky from anywhere in the world, if not by the naked eye, then with a telescope, but you can't. If you are on flat land, all you see is flatness all the way to the horizon.

Is air a thing that can block light? 
Is air a thing that can redirect light? 
If not then you'll have to explain to me again why I can see a city skyline from across more than 60 miles of curved water. And, who knows, maybe you could see Mt. Everest from extreme distances, assuming there are no obstructions. Why not try pointing a high-powered laser at it?

'Curved water'? Why is the water curved? If the Earth wasn't more or less ball-shaped, there should be no curve on the surface of a body of water. 

As for Mount Everest, you couldn't see it from New York or Tokyo even with the most powerful telescope ever devised (there's a planet in the way).

Boru