It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93
The cigarette lighter was invented before the match.
210
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Whale oil was used in automobile transmissions as late as 1973.
56
The first alarm clock could only ring at 4 a.m.
120
Energy is being wasted if a toaster is left plugged in after use.
21
More than a billion transistors are manufactured every second.
-25
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20