Research indicates that plants grow healthier when they are stroked.
173
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 aren't sure what color dinosaurs were.
312
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
No matter how cold it gets, gasoline will not freeze.
107
In zero gravity, a candle's flame is round and blue.
16