Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Most dust particles in your house are made from dead skin!
67
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
A single speck of dust is half way in size between a subatomic particle and the Earth.
15