/kloc-One day in 0/0, a young German meteorologist Wei Gena was looking at a map of the world. He was surprised to find that a convex part of Brazil in South America was very similar to a concave part on the coast of Cameroon in Africa. If you put them together, they will match well. Why is this a coincidence? Could it be that in Archean, the two continents were originally one, but later they split and drifted, forming what they are now? When Wei Gena put forward this idea, he pointed out: "But I immediately gave it up and didn't think it was of great significance."

A year later, in the autumn, by chance, Wei Gena saw this in a collection: According to the evidence provided by paleontology, there is a land connection between Brazil and Africa. Wei Gena said: This is something I didn't know before. This written record prompted me to make a hasty study on this issue within the scope of geodesy and paleontology around the above objectives, and drew an important positive argument, from which I am convinced that my idea is basically correct. "

On this basis, Wei Gena put forward the hypothesis of "continental drift" in 19 12. According to this theory, before the Mesozoic era, 200 million years ago, there was only one huge primitive land on the earth, called Pangea, surrounded by Wang Yang. Later, due to the gravity of celestial bodies and the centrifugal force of the earth's rotation, Pangea began to fall apart, just like ice floating on water, drifting away. Since then, America has separated from Asia and Europe, leaving the gap between the Atlantic Ocean; Part of Africa bid farewell to Asia. In the process of drifting away, its southern end deflected and gradually separated from the Indo-Pakistan subcontinent, and the Indian Ocean was born.