Nylon is made from coal and petroleum.
42
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Most dust particles in your house are made from dead skin!
67
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
57
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75