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Atlas of Wonders and Monsters 1 HN point 17 Nov 23
  1. Heinrich Geissler invented the Geissler tube, a crucial technology that led to the development of modern world technologies.
  2. Geissler tubes were originally sold as novelty items before becoming important for lighting, including fluorescent and neon lights.
  3. The Geissler tube's descendants include the cathode-ray tube used in TVs, computers with vacuum tubes, transistors, and even diodes, impacting numerous aspects of our daily lives.
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