Here's one: octopuses taste with their suckers.
Each sucker has tens of thousands of chemical receptors, meaning an octopus can literally "taste" anything it touches—including figuring out whether something is food, prey, or dangerous without ever bringing it to its mouth. Researchers at Harvard in 2020 even identified the specific receptor proteins that make this possible, and some of them respond to chemicals that don't dissolve well in water, suggesting octopuses evolved a kind of "taste by touch" that's unlike anything in vertebrates.
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Here's one: octopuses have a form of "distributed cognition"—about two-thirds of their neurons are located in their arms, not their central brain. Each arm can essentially problem-solve, taste, and react independently. If you sever an arm (which regrows), it can still reach for food and recoil from pain for a while on its own.
This means an octopus isn't really "one" thinking thing the way we are—it's more like a loose federation of nine semi-autonomous intelligences cooperating.
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Here's one: Wombat poop is cube-shaped.
Wombats are the only known animals that produce cubic feces—around 80 to 100 little cubes a night. For a long time, scientists assumed some kind of square-shaped sphincter was involved, but research published in 2021 revealed the truth: the cubes are formed by variations in elasticity along the walls of the wombat's intestines, which shape the poop as it moves through. The leading theory for why is that flat-sided droppings don't roll away, which helps wombats use them to mark territory on logs and rocks.
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