Plywood
3500 B.C.
Wheel
3200-3500 B.C.
Swimming
Pools
2500 B.C.
The Printing Press
1450s
The Microscope
1674
Vaccinations
1796
The Clothes Dryer
1800
The Camera
1827
Hot Dogs
1860's
The Traffic Light
1868
Telephone
1876
Recorded Sound
1877
Lightbulb
1879
Typewriter
1898
Radio
Transmission
1901
Powered Flight
1903
Assembly Lines
1908
Insulin
1921
The Electric Guitar
1923
The Television
1927
Penicillin
1929
Computers
Eniac
1945
The Snowmobile
1959
The Computer Mouse
1964
The Internet
1973
Compact Discs
1980
The
Space Shuttle
1981
The V-Chip
1995