Japanese researchers recently the incredible ability of a sea slug to basically sever its own head and simply grow a new body, complete with fresh vital organs.
Autotomy, the behavior whereby an animal sheds or discards one or more of its own appendages, usually as self-defense mechanism, only to grow them back later, is well documented in the animal world. However, autotomy usually involves limbs or tails, appendages that don’t feature vital organs, whish is why a sea slug that can apparently sever its own head and then grow a new body complete with these vital organs has stunned scientists.