Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Most dust particles in your house are made from dead skin!
67
Iron weighs more after it rusts.
68
The average temperature at 40,000 feet above sea level is -60 F.
56
Iron weighs more after it rusts.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39