“Invasion of the Giant Tortoises” explores the controversial introduction of a non-native species to the African island of Mauritius. Once home to the dodo, Mauritius was teeming with giant tortoises until the arrival of man. The introduction of predators and habitat loss doomed these majestic creatures to extinction. Now biologists have embarked on a radical plan: to replace the extinct Mauritian tortoise with a close relative: the giant tortoise from Aldabra, a deserted atoll near the Seychelles. How will the island's eco-system respond? And how do the results of this experiment change how we thing about biodiversity?