In the early 1960's, Porsche commercially manufactured farm tractors.
24
Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
More than a billion transistors are manufactured every second.
-25
The United States produces enough plastic film annually to cover the entire state of Texas.
13
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93