Someday we may grow our own new limbs back.
Quote:
Regrowing amputated limbs, broken backs and even damaged brains could one day be a reality after scientists discovered a gene that is key to the almost magical ability.
Researchers have found that the gene p21 appears to block the healing power still enjoyed by some creatures including amphibians but lost through evolution to all other animals.
By turning off p21, the process can be miraculously switched back on. They turned off the gene in mice which had damaged ears and they regrew them. While they say it is early days, there is nothing theoretically different about applying the same process to humans.
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http://www.telegraph.co.uk/health/he...mphibians.html