The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
One 75-watt bulb gives more light than three 25-watt bulbs.
57
German chemists made a replica of a trophy the size of one molecule.
68
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17