Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Most dust particles in your house come from dead skin.
48
Hot water can freeze faster than cold water.
181