Animals
3
Octopuses have three hearts and blue blood.
Octopuses have three hearts: two supply the gills and one supplies the rest of the body. Their oxygen-carrying protein contains copper and turns blue when oxygenated.
Octopuses have three hearts and blue blood.
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Animals
Cubes
Wombats poop cubes.
Wombats produce distinctly cube-like droppings, shaped inside the intestine rather than by a square opening. Research links the shape to differences in the mechanical properties of the intestinal wall.
Animals
Paws
Sea otters hold hands while they sleep so they don't drift apart.
Sea otters sometimes hold one another’s paws while resting, but not every sleeping otter does so. They also use kelp to help remain in place while floating.
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