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What are some major Mayan inventions?
The Mayan Calendar and number system
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What were some of the major inventions of the 1900s?
Some inventions that immediately come to mind are airplanes, mass produced automobiles, radio, television, antibiotics, polio vaccines, computers, digital sound reproduction, transmission, and...
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What were some major inventions of sumerians?
Canals wagons plows Astronomy Mythology and Clock minutes
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What were some major inventions of the 1970s?
Rollerblades, Pong (the game), The walkman, rubik's cube, the post it note, Simon says (the electronic game, and many others
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What were some of the major inventions of the 1940s?
The radar, jet aircraft, Slinky, Jeep, television, Velcro, microwave oven, and Frisbee were the main ones.