The smell of freshly cut grass is actually a plant distress call.
31
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
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
The sun is 330,330 times larger than the earth.
75
Nearly 50% of the world's scientists are assigned to military projects.
71
In zero gravity, a candle's flame is round and blue.
16
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
For every gallon of sea water, you get more than a quarter pound of salt.
45