Brass doorknobs automatically disinfect themselves in about 8 hours.
18
A cubic yard of air weighs about 2 pounds at sea level.
31
Sound at the right vibration can bore holes through a solid object.
134
Out of all the senses, smell is most closely linked to memory.
146
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
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
One ragweed plant can release as many as one billion grains of pollen!
51