Coins usually survive in circulation for about 30 years.
66
More than 10% of the world's salt is used to de-ice American roads.
54
Water is actually naturally blue.
48
You can tape a small mirror onto a cone speaker, play music and shine a laser on to the mirror and the reflection will look like a laser light show on your wall.
102
At 90 degrees below zero, your breath will freeze in mid-air and fall to the ground.
25
In the U.S., more than 10% of lottery prizes go unclaimed!
55
Babies are born without knee caps.
78
Music is as addictive to the brain as sex and drugs.
27