Within recent years all this has been changed. Naturalists and collectors have ransacked every part of the Central-American Isthmus, from the frontiers of the United States down to the Panama ...

An example of vicariance is the separation of marine creatures on either side of Central America when the Isthmus of Panama closed about 3 million years ago, creating a land bridge between North ...

Situated between Costa Rica and Colombia, this narrow isthmus nation serves as the link between Central and South America. It's also becoming a hotspot for ecotourism, with misty mountains ...