1- 30 years ago: The computer mouse was invented.
2- The human eye blinks an average of 4,200,000 times a year.
3- The ears of a cricket are located on the front legs, just below the knee.
4- The microwave was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket.
5- No matter its size or thickness, no piece of paper can be folded in half more than 7 times.
6- When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
7- Starfish don't have brains.
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