The smell of freshly cut grass is actually a plant distress call.
31
The average home creates more pollution than does the average car.
33
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Sound travels fifteen times faster through steel than through air.
134
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The storage capacity of human brain exceeds 4 Terrabytes.
140
A 'jiffy' is an actual unit of time for 1/100th of a second!
66