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I (and my 6-year-old) really enjoyed this video from Veritasium about the invention of the blue LED. https://www.youtube.com/watch?v=AF8d72mA41M https://www.you
by waltbosz 1y ago
I (and my 6-year-old) really enjoyed this video from Veritasium about the invention of the blue LED. https://www.youtube.com/watch?v=AF8d72mA41M https://www.youtube.com/watch?v=AF8d72mA41M