A small airplane can fly backwards.
75
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
The first alarm clock could only ring at 4 a.m.
120
Any modern jet is capable of breaking the sound barrier.
34
More than a billion transistors are manufactured every second.
-25
There are only 14 blimps in the world.
69
Jumbo jets use 4,000 gallons of fuel to take off.
19