A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Each day, up to 150 species of life become extinct.
-23
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Balsa wood is classified as a hard wood!
41
If the chemical sodium is dropped into water it will immediately and violently explode.
67
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155