It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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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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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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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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In Australia, there are spiders big enough to eat snakes.
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