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Period: to
The 20's
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The First Traffic Light is Created
Made with red, amber, and green lights, the first traffic light was made by police officer William Potts -
First Car with a Cumbustion Engine
Invented by Henry Ford, this car was one of the first to be mass-produced, creating lots of jobs. -
The Band-Aid
Earle Dickson invented the Band-Aid because his wife would often cut herself -
Lie Detector Test is Invented
The test was created by John A. Larson while he was in medical school. -
First Robot is Built
The first bot is built in 1921, starting the first artificial life -
Kool-Aid
Originally called Fruit Smack, Kool-Aid was created by Edwin Perkins -
First Electronic Television
Philo Farnsworth invents the first electronic television. The first image it displayed was a dollar sign. -
The Iron Lung
Used to help polio patients with chest paralysis, the iron lung helped manually expand and deflate lungs so that patients could breathe. -
Aerosol Spray Can
Norweigan Erik Rotheim patented the spray can in 1927, and its picture was put on a Norweigan stamp to celebrate. -
Penicillin discovered
Sir Alexander Fleming left one of his cultures out, and it molded, and he noticed the mold killed some of the bacteria. This led to one of the first antibiotic medicines
