There's No 'Undo' Button for Extinct Species / If we must bring back extinct species, let's focus on the giant herbivores / Dire Wolf: US scientists recreate long extinct species / Watch: First dire wolf's howl for 10,000 years after scientists bring extinct species 'back to life' / People do care about extinct species, but not for long--new study / Colossal Biosciences finds a home for one extinct species