A single speck of dust is half way in size between a subatomic particle and the Earth.
15
One third of the electricity produced on earth is used to power electric light bulbs!
75
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Diamonds can be shattered with a hammer.
-104
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
The average temperature at 40,000 feet above sea level is -60 F.
56
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15