MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Illustration of the Earth and its continents during the late Cretaceous period, when the dinosaurs became extinct, some 65 million years ago. South America and Africa were a lot closer together than they are now, and North America was split into two. A large portion of Africa and South America are submerged compared to their modern-day counterparts.
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