The first alarm clock could only ring at 4 a.m.
120
All GPS units sold in the civilian market have to be programmed to deactivate themselves if they detect they are travelling faster than 1200 MPH or are above 60,000 feet in altitude to prevent them being used in intercontinental ballistic missiles.
2
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
The cigarette lighter was invented before the match.
210
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
More than a billion transistors are manufactured every second.
-25
Sony researchers have developed a refrigerator that only opens when you smile.
9