Sound travels about 4 times faster in water than in air.
408
Iron weighs more after it rusts.
68
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Diamonds can be shattered with a hammer.
-104
A cesium atom in an atomic clock beats over nine billion times a second.
43
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57