Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Nylon is made from coal and petroleum.
42
Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
5
Sound travels fifteen times faster through steel than through air.
134
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A cubic yard of air weighs about 2 pounds at sea level.
31