UFO sightings have reduced by over 80% since the introduction of smartphones and public access to HD video.
2
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
More than a billion transistors are manufactured every second.
-25
Super Nintendo and Sega Genesis had an online multiplayer mode.
-2
The average car produces a pound of pollution every 25 miles!
18
Attics were invented in Attica.
43
The first alarm clock could only ring at 4 a.m.
120