There are only 14 blimps in the world.
69
The life boat was patented in 1845!
29
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
A small airplane can fly backwards.
75
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
Whale oil was used in automobile transmissions as late as 1973.
56