CNN —The heads of most animals are easily identifiable, but scientists haven’t been able to say the same for sea stars until now. But new genetic research suggests the opposite — that sea stars are largely heads that lack torsos or tails and likely lost those features evolutionarily over time. There, they go through a process that transforms a bilateral body into a star shape, or pentaradial body. But echinoderms also share a common ancestor with bilateral animals, which adds to the puzzle researchers are trying to solve. Specific molecular markers act like body plan blueprints, directing each cell to the body region where it belongs.

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Persons: haven’t, It’s, ”, Laurent Formery, “ It’s, Christopher Lowe, Jeff Thompson, “, ” Lowe, Formery, Chan Zuckerberg, Dr, Priscilla Chan, Mark Zuckerberg, Laurent Formery “, ” Thompson, Daniel Rokhsar Organizations: CNN, Stanford University, University of California, University of Southampton, NASA, National Science Foundation, Leverhulme Trust Locations: Berkeley, San Francisco