Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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A 42-foot sperm whale has about 7 tons of oil in it.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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One in three dog owners say they have talked to their pets on the phone.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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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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