Scientists say that alligators can regrow their tails up to 9 inches, or 18% of their bodies. This is not so impressive for a gecko or a lizard but an alligator? That is like growing back a whole forearm!
A biologist from Arizona State proved this by studying a regenerated tail that was slightly discolored with smaller scales than normal. This means that alligators are the largest animals known to regenerate limbs and can possibly help scientists research regeneration-based medicine in humans.