It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
The cigarette lighter was invented before the match.
210
More than a billion transistors are manufactured every second.
-25
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41