Indoor pollution is 10 times more toxic than outdoor pollution.
62
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
The sun is 330,330 times larger than the earth.
75
No matter how cold it gets, gasoline will not freeze.
107
Pure water (H2O) does not conduct electricity on its own.
46
Most dust particles in your house come from dead skin.
48
Aluminum used to be more valuable than gold!
84