When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Cold water weighs more than hot water.
93
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
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Sound travels fifteen times faster through steel than through air.
134
The sun is 330,330 times larger than the earth.
75
The earth is approx. 6,588,000,000,000,000,000 tons.
175