- A cats urine glows under a blacklight.
- When hydrogen burns in the air water is formed.
- The smallest ten prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29..
- A whip makes a cracking sound because its tip moves faster than the speed of sound.
- Dogs sweat through the pads on their feet.
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