In zero gravity, a candle's flame is round and blue.
16
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Sound at the right vibration can bore holes through a solid object.
134
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One 75-watt bulb gives more light than three 25-watt bulbs.
57
According to studies, men change their minds two to three times more often than women.
72