The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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Alligators can live up to 100 years.
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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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