Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The sun is 330,330 times larger than the earth.
75
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound travels about 4 times faster in water than in air.
408
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10