Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A ball of glass will bounce higher than a ball made of rubber.
73
Pumice is the only rock that floats on water.
14
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The bark of an older redwood tree is fireproof.
65
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