Iron weighs more after it rusts.
68
A cesium atom in an atomic clock beats over nine billion times a second.
43
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
The force of a suction cup is calculated using F=AP.
15
Sound travels about 4 times faster in water than in air.
408
