When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
The Band-Aid was originally made for the inventor's wife, who often cut and burned herself while cooking.
6
The name Joshua is Hebrew for 'Jesus'.
74
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
Only humans shed emotional tears.
331
Since 1982, a radio frequency emanating from Russia has been broadcasting a buzzer-like sound and, periodically, an unknown voice reads orders, names, and numbers. No one knows where exactly it is coming from or what it means.
13