What do The Beagle, Darwin's Theory of Evolution and Tortoises have in Common? When Darwin Sailed on a Ship called the Beagle to the Galapagos Islands, he Noticed that Different Tortoise Species Survived on Islands with Different Environments by Adapting to the Ecosystem Present on the Island they inhabited. Thus these Tortoises Played a Pivotal Role in Formulating his Theory of Evolution. Darwin came to the Realization that those Tortoises who Possessed Mutated Physical Traits Thrived, the