A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Aluminum used to be more valuable than gold!
84
For every gallon of sea water, you get more than a quarter pound of salt.
45
The average temperature at 40,000 feet above sea level is -60 F.
56
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Billions of neutrinos pass unnoticed through your body every second.
6
In zero gravity, a candle's flame is round and blue.
16