Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Diamonds can be shattered with a hammer.
-104
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17