Summary:
- Alfred Wegener said that the continents had been joined as a single landmass, which he called Pangaea.
- He had a lot of evidence to support his hypothesis, but he could not explain how the continents could move through the oceans.
- He suggested that continental drift occurred like an icebreaker plows through sea ice.
- Wegener died in 1930 on an expedition on the Greenland icecap.
- The continental drift hypothesis was put to rest for a few decades.
- It was when technology could provide more evidence for continental drift that scientists looked into the idea again.