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Alfred Wegener Great Minds

Alfred Wegener: Great Minds

Continental drift cartoon

A theory proposed by Alfred Wegner in 1912 stating that the Earth’s crust drifted slowly on top of a liquid core. He hypothesized that before the continents where in their current positioning they had formed a giant supercontinent that he called Pangaea. Wegner proposed that this supercontinent existed 200 million years ago. During the Jurassic period Pangaea  broke into two smaller supercontinents that he called Laurasia and Gondwanaland. It was not until the end of the Cretaceous period that the continents had finally separated into the landmasses resembling our current continents.

Continental Drift and Evolution[]

The continental drift theory helps explain many evolutionay questions when it comes to closely related yet differnt species of plants and animals. For example, this theory helps to explaine how there are marsupial mammals in both South America and Australia. You see when the continents began separating species that one lived clost together became separated from one and other causing them to need to evolve to best fit their new geological surroundings over time. This evolution eventually lead to new species be formed though a process called speciation .