Each day, up to 150 species of life become extinct.
-23
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Out of all the senses, smell is most closely linked to memory.
146
For every gallon of sea water, you get more than a quarter pound of salt.
45
Iron weighs more after it rusts.
68