- German Alfred Wegener among the first to use balloons to track air currents participated in expedition to Greenland.
- He became better because of his theory continental drift.
- People started to find out that coasts of West Africa and Eastern Southern America seemed to match.
- Wegener found evidence that all of the continents were once joined together.
- He called the continents joining together Pangea of super continent.
- People didn't believe him in the 1950's and 1960's.
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