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Clarence Birdseye and Charles Seabrook made such thing called frozen food preservation
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Clarence Birdseye created such things to preserve foods called "Frozen Foods"
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Ernst Ruska envented the electronic microscope
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Wallace Carothers made nylon
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Jonas Salk made the polio vaccine
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In 1972 Godfrey Hounsfield and Allan Cromack made the CAT scan.
A list shows items. A timeline shows sequence.
Use Timetoast to make dates, milestones, and turning points easier to understand in a clear visual format. Timetoast is a timeline maker for work, school, research, and stories.