Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
According to studies, men change their minds two to three times more often than women.
72
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
Aluminum used to be more valuable than gold!
84
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
Iron weighs more after it rusts.
16