Never. It was just a theory that was varafied wrong.
Projection
i think its curved
a map
A plane.
A map is a flat drawing that shows all or parts of earth surface.
A map.
I think it's the crust, but I'm not completely sure.
Assuming you are referring to a representation of the earth then it would be a map.
The Cenozoic era's surface was very bumpy and that when the Earth was flat. When the world started getting round Earths surface started getting flat, but that when there was a lot of earthquakes, which wiped out all the dinasours and made them exstinct.
its working
i believe roughly 70% (not completely sure though) I'm not really sure, but something like 70% of the earths surface..
One advantage to using a globe is that you can more accurately determine distances than you can with a flat map. Flat maps distort the spherical surface and that distortion can be significant over long distances.