The IRS processes more than 2 billion pieces of paper each year.
28
The first alarm clock could only ring at 4 a.m.
120
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
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
Sony researchers have developed a refrigerator that only opens when you smile.
9
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
