Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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At room temperature, the average air molecule travels at the speed of a rifle bullet.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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In zero gravity, a candle's flame is round and blue.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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