- The term 'disc jockey' was first used in 1937.
- The electric toothbrush was invented in 1939.
- A humming bird flaps its wings up to 90 times a second (5,400 times a minute).
- The most difficult-to-pronounce town is in Wales: Llanfairpwllgwyngyllgogerychwyrndrobwyll llantysiliogogogoch.
- In zero gravity, a candle's flame may appear circular and blue.
- Jellyfish don't have a brain.
- Adults laugh only about 15 to 100 times a day, while preschoolers laugh an average of 300 times a day.
- Hippopotamuses have killed more people in Africa than any other animal.
- One of the ingredients needed to make dynamite is peanuts.
- The average raindrop takes 2 minutes to hit the ground.
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