A small airplane can fly backwards.
75
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
More than a billion transistors are manufactured every second.
-25
The first alarm clock could only ring at 4 a.m.
120
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
The ball on top of a flagpole is called a 'truck'.
24
The life boat was patented in 1845!
29