How To Bring Animals Back From Extinction

We've all seen the movies and heard the hype: But is it really possible to bring back animals that have gone extinct? If so, how? And how soon? And can I have a mammoth to ride around in my backyard? Hank Green of SciShow explains the latest research into resurrection biology, and ponders questions that include not only 'Can we?' and 'How do we?' but also: 'Should we?'

YouTube link