10 to 100 years ago

1. 100 years ago: The first Cellophane is invented.
- source: http://inventors.about.com

2. 90 years ago: The Grand Canyon became a national monument.
- source: http://lcweb2.loc.gov/ammem/gmdhtml/nphtml/gchome.html


3. 80 years ago: The food mixer and the domestic refrigerator were invented.
- source: http://inventors.about.com/library/inventors/blrefrigerator.htm


4. 70 years ago: Otto Hahn discovered nuclear fission by splitting uranium
- source: http://en.wikipedia.org/wiki/Otto_Hahn

Bardeen and Brattain's transistor, as replicated in 1997

5. 60 years ago: Transistor was invented
- source: http://www.efluxmedia.com

6. 50 years ago: Velcro was invented.
- source: http://wiki.answers.com/Q/Who_invented_Velcro

An old mechanical calculator

7. 40 years ago: LCD (Liquid Crystal Display) & Electronic Calculator
- source: http://en.wikipedia.org/wiki/Calculator


8. 30 years ago: The computer mouse was invented.
- source: http://en.wikipedia.org/wiki/Computer_mouse


9. 20 years ago: The game of TETRIS was invented.
- source: http://english.pravda.ru/main/18/90/363/15449_tetris.html

10. 10 years ago: First patent for a genetically- engineered mouse was issued to Harvard Medical School.- source: New York Times