Nemster,

Good answer but perhaps you should use some thyme and tarter sauce instead of catchup on your shark.
Actually you should batter the shark bites and deep fry, with a touch of thyme.

The earth has to be flat, because a jet on auto pilot does not fly off into space.

Actually in the ancient Vedas it says all this is illusion (Maya) so perhaps we should ask, is a holograph flat ?

At the equator, the circumference of the Earth is 40,070 kilometers, and the day is 24 hours long so the speed is 1670 kilometers/hour ( 1037 miles/hr). This decreases by the cosine of your latitude so that at a latitude of 45 degrees, cos(45) = .707 and the speed is .707 x 1670 = 1180 kilometers/hr. You can use this formula to find the speed of rotation at any latitude.

But just as long as I don't fly off ( earth rotation 1037 mph @ equator ) It does not matter to me if a holograph is flat or round, or that there is no such thing as a straight line ! Is there ?

Wait a minute did I not see a photo of earth from the international space station it looks round like a marble, must be a good projector.

Lets try a better question, how do twenty lark's fly in perfect harmony turning , looping ,up and down in sink without head phones and a radio? (hard to hold radio with wing while flying)