When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
A quarter has 119 grooves on its edge, a dime has one less groove!
34
It takes 492 seconds for sunlight to reach the Earth!
44
The mile is Latin for 1,000. The number of paces it took the average Roman!
36
Play-Doh was first manufactured as a wallpaper cleaner.
122
One human hair can support 3 ounces.
191