It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
The cigarette lighter was invented before the match.
210
The life boat was patented in 1845!
29
More than a billion transistors are manufactured every second.
-25
Attics were invented in Attica.
43
Any modern jet is capable of breaking the sound barrier.
34