A cesium atom in an atomic clock beats over nine billion times a second.
43
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Nylon is made from coal and petroleum.
42
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One barrel of petroleum holds 42 gallons.
20
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Research indicates that plants grow healthier when they are stroked.
173
