The cigarette lighter was invented before the match.
210
More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Castor oil is used as a lubricant in jet planes.
-5
Attics were invented in Attica.
43
More than a billion transistors are manufactured every second.
-25
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0