What does the shape of the continents tell us?

The shapes of the continents gives us an insight into earths past and history.When tried to arrange they seem to fit in like a "Jigsaw puzzle".This tells us that there was once a time,aeons of years ago when all continents were together as one "Super continent",but were separated by "Drifting",reshaped and sculptured by agents of "Denudation".