- Hippopotamuses have skin 3.8cm (1.5in) thick.
- Honeybee's top speed is 24kph (15mph).
- Horses have 18 more bones than humans.
- Horses sleep standing up.
- House cats have 18 claws.
- Humming bird flaps its wings up to 90 times a second (5,400 times a minute).
- Hummingbird's heart beats at over a 1,000 times a minute.
- Iguana can stay under water for 28 minutes.
- It takes 5 years for an oyster to produce a medium sized pearl.
- It's physically impossible for pigs to look up at the sky.
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