The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
A small airplane can fly backwards.
75
Sony researchers have developed a refrigerator that only opens when you smile.
9
The electric chair was invented by a dentist!
122
The first alarm clock could only ring at 4 a.m.
120
Mico headphones read your brainwaves and select music based on your state of mind.
7
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46