Kleenex tissues were originally used as filters in gas masks.
46
Any modern jet is capable of breaking the sound barrier.
34
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
A small airplane can fly backwards.
75
The first alarm clock could only ring at 4 a.m.
120
Super Nintendo and Sega Genesis had an online multiplayer mode.
-2