The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The ball on top of a flagpole is called a 'truck'.
24
Whale oil was used in automobile transmissions as late as 1973.
56
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
