Nylon is made from coal and petroleum.
42
In zero gravity, a candle's flame is round and blue.
16
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
One barrel of petroleum holds 42 gallons.
20
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
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!
21
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Most dust particles in your house are made from dead skin!
67