A small airplane can fly backwards.
75
More than a billion transistors are manufactured every second.
-25
Super Nintendo and Sega Genesis had an online multiplayer mode.
-2
The electric chair was invented by a dentist!
122
The life boat was patented in 1845!
29
The cigarette lighter was invented before the match.
210
The first alarm clock could only ring at 4 a.m.
120