The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
One barrel of petroleum holds 42 gallons.
20
Scientists aren't sure what color dinosaurs were.
312
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
If the chemical sodium is dropped into water it will immediately and violently explode.
67
