It wasn't until 1912 that meteorologist Alfred Wegener hypothesized that Earth's continents had once been joined as a ...

Over two hundred fifty million years ago, India, Africa, Australia, and South America were all one continent called Pangea. Over the next several million years, this giant southern continent ...

Over millions of years, tectonic plates moved and broke Pangea up into the continents we know today, but they're still moving. Tectonic movement causes things like earthquakes and volcanoes.