It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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Most dust particles in your house are made from dead skin!
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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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A cubic yard of air weighs about 2 pounds at sea level.
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In zero gravity, a candle's flame is round and blue.
16
Nylon is made from coal and petroleum.
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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