Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Hot water can freeze faster than cold water.
181
For every gallon of sea water, you get more than a quarter pound of salt.
45
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Most dust particles in your house come from dead skin.
48