Grow Me Another One!

Unlike some other simple vertebrates, an African clawed frog cannot normally regenerate an amputated limb. Scientists, however, prevented scarring by covering the frog's wound with a silicone cap containing a 5-drug cocktail. The drugs were selected to do things like prevent inflammation, stimulate nerve development etc (https://www.theguardian.com/science/2022/jan/26/frog-regrows-amputated-leg-after-being-given-drug-treatment). This treatment led to the frogs eventually growing a replacement structure that could even be used in swimming. The scientists suspect that many vertebrates have a residual ability to regenerate body parts. They now want to see if the same procedure works in Mammals. If it does, it may even be tried in humans.