A fully loaded supertanker traveling at normal speed takes a least twenty minutes to stop.
27
The first alarm clock could only ring at 4 a.m.
120
Any modern jet is capable of breaking the sound barrier.
34
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The average car produces a pound of pollution every 25 miles!
18
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
