Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
Nylon is made from coal and petroleum.
42
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
One barrel of petroleum holds 42 gallons.
20
Indoor pollution is 10 times more toxic than outdoor pollution.
62
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Iron weighs more after it rusts.
16