Ancient Penis Worms Commandeered Shells for Self-Defense, Fossils Show
Hermit crabs move into other animals ’ discarded eggshell as tax shelter , because the ocean is a unreliable place , full of hungry predators . Half a billion years ago , another creature acquire the same defensive strategy , suggests newfangled fossil evidence . But this was no Cancer . It was a penis worm — an creature that take care precisely how you ’d bear . Penis worms are cylindric , spineless animals found in the phylum Priapulida , and they often do resemble their genital namesake , but the similarity stop at the general form ....