Researchers mapped starfish genes to solve the mystery, and it wasn't what they expected. Turns out, starfish genes suggest it contains multiple heads, one at the center and in each limb. AdvertisementAdvertisementIn a game of pin the tail on the donkey, scientists have finally pinpointed the head on a starfish. Turns out starfish, aka sea stars, don't just have one head sitting at the center of their bodies. On the other hand, sea stars with five limbs, lack bilateral symmetry and instead have what's called five-fold radial symmetry.

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Persons: —, Laurent Formery, Peter Guttman, Formery, Jeff Thompson, he's Organizations: Service, Stanford School of Humanities and Sciences, Getty, Stanford, University of Southampton Locations: Nature