Kleenex tissues were originally used as filters in gas masks.
46
Any modern jet is capable of breaking the sound barrier.
34
Mico headphones read your brainwaves and select music based on your state of mind.
7
To have your picture taken by the very first camera you would have had to sit still for 8 hours!
308
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
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47