When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Pure water (H2O) does not conduct electricity on its own.
46
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Sound travels about 4 times faster in water than in air.
408
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The average temperature at 40,000 feet above sea level is -60 F.
56