The first alarm clock could only ring at 4 a.m.
120
Car airbags kill 1 person for every 22 lives that they save.
80
There are only 14 blimps in the world.
69
Mico headphones read your brainwaves and select music based on your state of mind.
7
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
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
Whale oil was used in automobile transmissions as late as 1973.
56
Castor oil is used as a lubricant in jet planes.
-5