A small airplane can fly backwards.
75
Whale oil was used in automobile transmissions as late as 1973.
56
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
Jumbo jets use 4,000 gallons of fuel to take off.
19
The first alarm clock could only ring at 4 a.m.
120
There are only 14 blimps in the world.
69