Brass doorknobs automatically disinfect themselves in about 8 hours.
18
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
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
The force of a suction cup is calculated using F=AP.
15
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55