The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Attics were invented in Attica.
43
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
The average car produces a pound of pollution every 25 miles!
18