- A cat uses its whiskers to determine if a space is too small to squeeze through.
- Hydrogen is the most abundant element in the Universe (75%).
- Swiss mathematician Leonhard Euler was probably the most influential mathematician of the 18th century, making discoveries in graph theory and introducing many modern mathematical words and notations among other things.
- Elephants communicate in sound waves below the frequency that humans can hear.
- The Colgate toothpaste company started out making starch, soap, and candles.
- Sharks lose teeth a lot when they eat. Some sharks will replace as many as 25,000 teeth in a lifetime.
- The naming of tropical storms and hurricanes officially began in 1953.
- You begin to feel thirsty when your body losses 1% of water.
- A flipped coin is more likely to land on the side it started on.
- The Olympic flag was designed in 1913.
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