The earth is approx. 6,588,000,000,000,000,000 tons.
175
According to studies, men change their minds two to three times more often than women.
72
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Most dust particles in your house come from dead skin.
48
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17