Sound travels about 4 times faster in water than in air.
408
One third of the electricity produced on earth is used to power electric light bulbs!
75
A cesium atom in an atomic clock beats over nine billion times a second.
43
Each day, up to 150 species of life become extinct.
-23
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44