A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
Iron weighs more after it rusts.
68
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
One barrel of petroleum holds 42 gallons.
20
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
The force of a suction cup is calculated using F=AP.
15