Nylon is made from coal and petroleum.
42
Most dust particles in your house come from dead skin.
48
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Brass doorknobs automatically disinfect themselves in about 8 hours.
18