Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
In zero gravity, a candle's flame is round and blue.
16
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Cold water weighs more than hot water.
93
A ball of glass will bounce higher than a ball made of rubber.
73
Iron weighs more after it rusts.
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57