The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The average temperature at 40,000 feet above sea level is -60 F.
56
Your brain is 80% water.
525
Nylon is made from coal and petroleum.
42
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9