Pangea was an ancient continental landmass which formed about 240 million years ago. Had you been around to see the Earth at this time, you would have set your feet on most of the bits and pieces that would go on to become continents we know today. In the Earth's long history, most of the major continental places were gathered into a single mass. Pressure from deep within the Earth let to the break up of Pangea into the two huge landmasses of Gondwana and Laurasia.
Gondwana would split yet again into the modern contents of South America, Africa, India, Australasia and Antarctica. While they are far apart today, we find similar fossils on each of the continents from their shared history.