The key to regeneration

Scientists have experimented on genetically modified axolotl salamanders and concluded that the key to it’s regeneration power - it can replace lost limbs, lungs, sliced spinal cord, and brain - lies within tissues that retain "memories." Interestingly, these tissues are found within all species, including humans. "I think it’s more mammal-like than was ever expected," said Malcolm Maden, a professor of biology, and author of the paper. "It gives you more hope for being able to someday regenerate individual tissues in people."

Science Daily