The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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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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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Cats and dogs can hear ultrasound.
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