In zero gravity, a candle's flame is round and blue.
16
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
A cesium atom in an atomic clock beats over nine billion times a second.
43