The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Nearly 50% of the world's scientists are assigned to military projects.
71
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
One cubic foot of gold weighs more than 1,200 pounds!
78
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5