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The blue whale is the largest animal known to have ever lived, bigger than any dinosaur.

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A blue whale surfacing in the ocean
Animals

30 m

The blue whale is the largest animal known to have ever lived, bigger than any dinosaur.

Yes. Blue whales can grow to around 30 meters and weigh more than 150 tonnes, making them the largest animals known to have existed. Even the biggest long necked dinosaurs are thought to have been lighter.

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Octopus vulgaris (common octopus)
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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.
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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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