Jellyfish as a species are actually older than dinosaurs and sharks.
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The elephant brain weighs about 6,000g.
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Tigers can see 6 times better at night than humans.
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Unsinkable Sam (nickname of a German ship's cat) who served on 3 warships, one German, two British, all sank in action. The cat survived each sinking, floating away on wooden planks to rescue.
19
Cats and dogs can hear ultrasound.
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