The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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The elephant brain weighs about 6,000g.
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Dogs have been man's pet for over 14,000 years.
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Cats and dogs can hear ultrasound.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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Sharks have been on the planet longer than trees.
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