Iron weighs more after it rusts.
68
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Research indicates that plants grow healthier when they are stroked.
173
Out of all the senses, smell is most closely linked to memory.
146
In zero gravity, a candle's flame is round and blue.
16