Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The sun is 330,330 times larger than the earth.
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The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
A cubic yard of air weighs about 2 pounds at sea level.
31
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
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
4.5 pounds of sunlight strike the Earth each day.
27
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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