When glass breaks, the cracks move faster than 3,000 miles per hour. To photograph the event, a camera must shoot at a millionth of a second!
114
In the case of an emergency, a Crayola crayon can be used as a candle and will burn for about 15 minutes.
36
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
On average people fear spiders more than they do death.
447
In many countries, urine was used as a detergent for washing.
17
The human eye blinks an average of 4,200,000 times a year.
233
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
240
