Only 3% of bird species have penises.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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A 42-foot sperm whale has about 7 tons of oil in it.
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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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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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There's a rare breed of pig that looks like a sheep.
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Nicole Kidman is scared of butterflies.
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