Sound travels fifteen times faster through steel than through air.
134
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Most dust particles in your house come from dead skin.
48
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Cold water weighs more than hot water.
93
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
If the chemical sodium is dropped into water it will immediately and violently explode.
67