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Polar bears look white even though their guard hairs lack white pigment.

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Female polar bear (Ursus maritimus) near Kaktovik, Barter Island, Alaska.
Animals

Clear hairs

Polar bears look white even though their guard hairs lack white pigment.

Polar bears look white, but their guard hairs are translucent rather than filled with white pigment. The coat's interaction with light creates its pale appearance, while dense fur and body fat help protect the bear from cold.

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Octopus vulgaris (common octopus)
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.

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Common Wombat (Vombatus ursinus tasmaniensis) on Maria Island, Tasmania, Australia. The entire island is a national park, Maria Island National Park. The adult is just under a metre in length on average.
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.

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