Pumice is the only rock that floats on water.
14
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Research indicates that plants grow healthier when they are stroked.
173
Liquid TIDE laundry detergent glows under a blacklight.
96
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20