When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
Coins usually survive in circulation for about 30 years.
66
Less than 3% of the water produced at a large municipal water treatment plant is used for drinking purposes!
24
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Seaweed can grow up to 12 inches per day!
59
Fine-grained volcanic ash can be found as an ingredient in some toothpastes.
55
The best time for a person to buy shoes is in the afternoon. This is because the foot tends to swell a bit around this time.
49