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

Alfred Wegener was one of those people ... we know today were once all attached in a single landmass he called Pangaea (Greek for "all earth"). They were surrounded by one global ocean, but ...

Alfred Wegener was one of those people ... we know today were once all attached in a single landmass he called Pangaea (Greek for "all earth"). They were surrounded by one global ocean, but ...

We know that this is not the case. Wegener suggested that mountains formed when the edge of a drifting continent collided with another, causing it to crumple and fold. For example, the Himalayas ...