In zero gravity, a candle's flame is round and blue.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Balsa wood is classified as a hard wood!
41
Your brain is 80% water.
525
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5