Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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Jellyfish as a species are actually older than dinosaurs and sharks.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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The colossal squid has the largest eyes in the world.
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Cows can sleep standing up, but they can only dream lying down.
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An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
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