- There was an exchange of animals from North and South America during the GABI
- Why there were more animals of North American origin in South America than vice versa has been a mystery
- A team of researchers may have found an explanation for the disparity
- It’s possible that many South American mammals actually went extinct
Why are there more South American animals of North American origins than North American animals of South American origin? A team of researchers found a possible explanation for the long-held puzzle.
The American continents weren’t always connected but tens of millions of years ago when the land bridge of Panama formed and connected North and South America, there was an exchange of animals between the once separated lands. Called the Great American Biotic Exchange (GABI), it is considered as one of the greatest biogeographical events.
However, one thing that has been puzzling paleontologists