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ACT
An exploration of four defining scientific inventions/discoveries of recent history: plastic, laser technology, electricity, and bar codes. The history and development of these technologies, along with examples of their application and potential downsides, are explained.
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great inventions, historical scientific discoveries, history of bar codes, history of electric energy, history of laser rays, history of plastic, history of science, laser technology, science curiosities, science education, science facts for kids, science for kids, science lessons for kids, scientific exploration, technology for kids, esl and science, science in portuguese, content area science