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 first alarm clock could only ring at 4 a.m.
120
Any modern jet is capable of breaking the sound barrier.
34
The ball on top of a flagpole is called a 'truck'.
24
Castor oil is used as a lubricant in jet planes.
-5
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20