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
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Balsa wood is classified as a hard wood!
41
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
Hot water can freeze faster than cold water.
181
If the chemical sodium is dropped into water it will immediately and violently explode.
67
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21