Beach Day? These 5 Surprising Creatures Are Hanging Out Too | KQED
Sand dollars are flat, spine-covered sea urchins that sift sand for food, breathe through a five-petaled petaloid, and use swallowed magnetite to stay grounded.
A brain appetite hub integrates taste signals and internal states to transform sweetness into motivation, controlling consumption intensity; activating it increases eating, silencing stops eating.