These two-headed worms could help scientists regrow lost limbs

The video above was posted by Adam Piore, author of Popular Science's feature about Levin as well as an upcoming book on bioengineering.

For now, Levin's research is mostly limited to experiments in simple, "cold-blooded" creatures like these flatworms. If all goes well, he could move on to humans in a few years or decades. Here's what that might look like.

[HT Adam Piore]