Conservation biologist John Ewen discusses the recent reintroduction of Tasmanian devils to mainland Australia after a 3,000-year absence and issues that need to be considered when bringing long-departed animals back into an area.

Conservation biologist John Ewen discusses the recent reintroduction of Tasmanian devils to mainland Australia after a 3,000-year absence and issues that need to be considered when bringing long-departed animals back into an area.