The first alarm clock could only ring at 4 a.m.
120
Jumbo jets use 4,000 gallons of fuel to take off.
19
Any modern jet is capable of breaking the sound barrier.
34
A toaster uses almost half as much energy as a full-sized oven.
33
The average car produces a pound of pollution every 25 miles!
18
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1
The cigarette lighter was invented before the match.
210