Scientists believe that Galápagos tortoises migrated from Sout | Awesome Science

Scientists believe that Galápagos tortoises migrated from South America to the archipelago some two to three million years ago. By 1835, when Charles Darwin arrived for the expedition that would ultimately inspire his theory of natural selection, these tortoises had evolved into distinct yet closely related species. The similarities among the animals were so striking that scientists long debated whether they were actually different types of the same species.