Great American Biological Interchange (IMAGE)

Smithsonian Tropical Research Institute

Great American Biological Interchange

Caption

After the Isthmus of Panama formed, animals and plants could move back and forth between continents, the Great American Biological Interchange. Smithsonian scientists are debating when this happened.

Credit

Smithsonian Tropical Research Institute

Usage Restrictions

Credit STRI

License

Licensed content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.