If Animals could regenerate like Planarians

     Planarians are non parasitic flat worms. They are very unique because they they are similar to starfish, they can regenerate a missing part in their body. These worms are able to get sliced in half, and regenerate into two living organism, also like a cell's division.
     This ability to regenerate a missing body part is amazing because if this was the case for all animals, then extinction is no longer a word that we would use in our dictionary. This would effect the ecosystem dramatically because, animals would be over populated due to the fact that they cannot die from the loss of an arm, where as if they weren't able to regenerate, they would just lie on the ground and wait for death. However, this does not apply to all animals because, if these regeneration abilities can be apply to extant, but almost extinct animals, this would be fantastic because these species of animals are able to keep on living on this earth.