00:00We turn now to that remarkable scientific breakthrough.
00:0213,000 years after the last dire wolf walked the earth,
00:06scientists say they've now brought them back.
00:10Tonight, a howl 13,000 years in the making.
00:15In a first for science, biotech company Colosal Biosciences says
00:19it brought the extinct dire wolf back to life,
00:22a species that hasn't walked the earth since the Stone Age.
00:25The dire wolf is the first extinct species.
00:28Well known from HBO's hit show Game of Thrones.
00:34Now seven months old, dire wolves Romulus and Remus
00:37eating well and getting bigger every day.
00:40ABC News given exclusive access into Colosal's lab in Dallas
00:44where scientists are using genes from gray wolves to create dire wolves.
00:50That animal looks like a dire wolf.
00:52It will behave like a dire wolf and it is a dire wolf.
00:55We've taken a gray wolf genome, a gray wolf cell,
00:59which is already genetically 99.5% identical to dire wolves.
01:04And we've edited those cells at multiple places in its DNA sequence
01:09to contain the dire wolf version of the DNA.
01:13And David, the company tells us they're not stopping there.
01:15They plan to have woolly mammoths roaming the earth again by 2028.
01:18But critics argue that this de-extinction could harm fragile ecosystems.
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01:54Transcription by CastingWords
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