The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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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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George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Sharks have been on the planet longer than trees.
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