When glass breaks, the cracks move at speeds of up to 3,000 miles per hour.
423
Only humans shed emotional tears.
331
If the human eye was a digital camera, it would have 576 megapixels.
25
Pollen never deteriorates. It is one of the few natural substances that lasts indefinitely.
58
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
The New York Stock Exchange started as a coffee shop!
99
The oldest living person smoked cigarettes from the age of 21 to 117.
13
Oak trees can live 200 or more years.
61