One of the world's rarest big cat species is the newest Columbus Zoo resident as part of a global conservation effort. The ...

Scientists across the globe are working to bring extinct species back to life. But do the facts measure up, or is this still ...

It's been decades since Australia's thylacine, known as the Tasmanian tiger, was declared extinct and scientists say they've made a breakthrough as they research ways to bring back the carnivore.

Efforts to revive the thylacine and woolly mammoth are forcing conservationists to face a long-overdue debate over what kind ...