The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Pumice is the only rock that floats on water.
14
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Aluminum used to be more valuable than gold!
84
The smell of freshly cut grass is actually a plant distress call.
31
According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
12
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79