Ancient North American Mammals May Have Gathered in Mexico and Diversified Before Moving to South America, Priming Them to Thrive There

A 10-Million-Year 'Holding Pen' Helped Shape Ancient Mammal Life in the Americas Before a Land Bridge Opened

Discover how ancient mammals gathered in Mexico before a massive migration transformed two continents.

Ancient North American Mammals May Have Gathered in Mexico and Diversified Before Moving to South America, Priming Them to Thrive There

An analysis of fossils from the country hints that animals from the north stayed in a "holding pen" between seven million and ten million years ago. The timeline might help explain why so many South American mammals have North American ancestry, but not vice versa

Mammals Crossed Between North And South America For Millions Of Years Before The Continents Joined

You might be very surprised to learn who some of the champion ocean crossers were.