Most dust particles in your house come from dead skin.
48
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The average temperature at 40,000 feet above sea level is -60 F.
56
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199