The electric chair was invented by a dentist!
122
Mico headphones read your brainwaves and select music based on your state of mind.
7
Super Nintendo and Sega Genesis had an online multiplayer mode.
-2
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
The cigarette lighter was invented before the match.
210
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46