Indoor pollution is 10 times more toxic than outdoor pollution.
62
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
One third of the electricity produced on earth is used to power electric light bulbs!
75
Most dust particles in your house are made from dead skin!
67
The bark of an older redwood tree is fireproof.
65
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
In zero gravity, a candle's flame is round and blue.
16