When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
One ragweed plant can release as many as one billion grains of pollen!
51
Nearly 50% of the world's scientists are assigned to military projects.
71
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71