Pangaea

Pangaea was a huge super-continent that existed 200 million years ago when the dinosaurs arrived. In 1915, Alfred Wegener purposed that Pangaea did exist. He thought this because matching fossils, coal beds and the same mountain ranges existed on many continents. Wegener was turned away because he didn't know how the continents moved. We now know that convection currents in the mantle move the plates and the continents move with them. The continents move one centimeter per year.  The plates are pieces of the Earth's lithosphere, or the crust. The crust is the top layer of the Earth, the one we live on.

The picture is a super-continent called Pangaea.