The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
A cesium atom in an atomic clock beats over nine billion times a second.
43
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
Iron weighs more after it rusts.
16
Each day, up to 150 species of life become extinct.
-23
A cubic yard of air weighs about 2 pounds at sea level.
31
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
A single speck of dust is half way in size between a subatomic particle and the Earth.
15