Sound travels fifteen times faster through steel than through air.
134
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Most dust particles in your house are made from dead skin!
67
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The storage capacity of human brain exceeds 4 Terrabytes.
140
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61