Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
German chemists made a replica of a trophy the size of one molecule.
68
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
The average home creates more pollution than does the average car.
33
Pumice is the only rock that floats on water.
14
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9