The so-called zombie worms break down bone by excreting acid, according to research just presented at the Society for Experimental Biology's meeting in Salzburg, Austria.

MSN: Zombie worm has no mouth �� but it feasts on whale bones

This mutation causes a change in one of the amino acid molecules that makes up an important enzyme for proper bone growth and formation.

MSN: Cause of rare and fatal dog skeletal disease pinpointed