Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Sound travels about 4 times faster in water than in air.
408
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Your brain is 80% water.
525
Iron weighs more after it rusts.
16
Diamonds can be shattered with a hammer.
-104
A single speck of dust is half way in size between a subatomic particle and the Earth.
15