Sound travels fifteen times faster through steel than through air.
134
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Cold water weighs more than hot water.
93
A ball of glass will bounce higher than a ball made of rubber.
73
Most dust particles in your house are made from dead skin!
67
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Research indicates that plants grow healthier when they are stroked.
173
Brass doorknobs automatically disinfect themselves in about 8 hours.
18