Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Diamonds can be shattered with a hammer.
-104
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
Billions of neutrinos pass unnoticed through your body every second.
6