When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Billions of neutrinos pass unnoticed through your body every second.
6
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
According to studies, men change their minds two to three times more often than women.
72
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65