The first alarm clock could only ring at 4 a.m.
120
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46
The IRS processes more than 2 billion pieces of paper each year.
28
A small airplane can fly backwards.
75
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
Mico headphones read your brainwaves and select music based on your state of mind.
7
More than a billion transistors are manufactured every second.
-25
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1