- A caterpillar has more muscles than a human.
- A spider's silk is stronger than steel.
- An individual blood cell takes about 60 seconds to make a complete circuit of the body.
- Earth's sky is purple, our eyes just see it as blue.
- Mosquitoes dislike citronella because it irritates their feet.
- A group of whales is called a pod.
- If you lick someone's elbow and they aren't paying attention, they will not notice it.
- The oldest word in the English language is 'town'.
- The tiny pocket in jeans was made for pocket watches.
- The surface area of your lungs is roughly the same size as a tennis court.
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