Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
Sound travels about 4 times faster in water than in air.
408
A cubic yard of air weighs about 2 pounds at sea level.
31
The force of a suction cup is calculated using F=AP.
15
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Pure water (H2O) does not conduct electricity on its own.
46