Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound travels fifteen times faster through steel than through air.
134
The average home creates more pollution than does the average car.
33
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
Sound at the right vibration can bore holes through a solid object.
134
Aluminum used to be more valuable than gold!
84