Historically (hundreds of millions of years ago), a number of other continents and supercontinents have existed, such as [[Pangaea]], [[Laurasia]] and [[Gondwanaland]]; these have been broken up and reassembled into the currently existing configuration, by the process of [[continental drift]]. | Historically (hundreds of millions of years ago), a number of other continents and supercontinents have existed, such as [[Pangaea]], [[Laurasia]] and [[Gondwanaland]]; these have been broken up and reassembled into the currently existing configuration, by the process of [[continental drift]]. |