- A group of frogs is called an army.
- A pigeon's feathers are heavier than its bones.
- More than 75% of all countries are north of the equator.
- Squirrels lose more than half of the nuts they hide.
- The ideal temperature to fall asleep is between 18-30c (64-86f).
- Sound travels 4.3 times faster through water than in air.
- Americans spend $10 million a day on potato chips.
- A lemon contains more sugar than a strawberry.
- Christmas trees originated from Germany.
- The supersonic Concorde jet made its first trial flight on January 1st 1969.
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