An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
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 IRS processes more than 2 billion pieces of paper each year.
28
If a car is travelling at 55 miles per hour it will travel 56 feet before the driver can shift his foot from the accelerator to the brake.
25
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60