Iron weighs more after it rusts.
68
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Pumice is the only rock that floats on water.
14
Research indicates that plants grow healthier when they are stroked.
173
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17