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
One third of the electricity produced on earth is used to power electric light bulbs!
75
Iron weighs more after it rusts.
16
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Aluminum used to be more valuable than gold!
84
4.5 pounds of sunlight strike the Earth each day.
27
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16