The first alarm clock could only ring at 4 a.m.
120
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
The Google driverless car has only encountered two accidents. The first it was rear ended at a stop sign, and the second was when a human was behind the wheel.
7
More than a billion transistors are manufactured every second.
-25
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
A toaster uses almost half as much energy as a full-sized oven.
33