There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
In zero gravity, a candle's flame is round and blue.
16
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 Earth's atmosphere weighs about 5.5 quadrillion tons.
108
4.5 pounds of sunlight strike the Earth each day.
27
Iron weighs more after it rusts.
68