Dire wolves have been extinct for over 10,000 years. Now, the start-up Colossal Biosciences says it's brought them back.

Colossal Biosciences CEO Ben Lamm poses with one of the wolves his company edited with dire-wolf genes.

Colossal Biosciences

• Colossal Biosciences says it created three wolf pups with the genes of ancient, extinct dire wolves.
• The startup's scientists call this "de-extinction," but other experts say these aren't dire wolves.
• What is certain is that these three wolf pups are the first of their kind.

The beginnings of a real-life "Jurassic Park" are playing out in a high-security...