Iron weighs more after it rusts.
68
Pumice is the only rock that floats on water.
14
Scientists aren't sure what color dinosaurs were.
312
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
Research indicates that plants grow healthier when they are stroked.
173