The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
In zero gravity, a candle's flame is round and blue.
16
Sound travels fifteen times faster through steel than through air.
134
Sound travels about 4 times faster in water than in air.
408
Nearly 50% of the world's scientists are assigned to military projects.
71
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75