If you put a hat on a starfish, where would you put it? On the center of the starfish? Or on the point of an arm and, if so, which one? The question is silly, but it gets at serious questions in the ...

A close-up view of a vibrant red starfish arm underwater, showing small tube feet extending from its textured surface.© A-Z Animals Imagine waking up to find your entire body gone — no torso, no limbs ...