Starfish "Arms" Actually Something Else, Scientists Discover

A new study published in the journal Nature reveals that starfish don't just have a head, they are a head, and their "arms" are also heads. The research, which used RNA tomography to map gene expression, suggests that starfish have a decoupling of the head and trunk regions, challenging previous assumptions about their anatomy. This discovery may provide new insights into the evolution of echinoderms and raises questions about their unique body plan.