Learn the history behind how fire was discovered by human ancestors. Understand how fire contributed to the human evolutionary line and helped paleolithic people survive. Related to this QuestionWho invented the first light bulb? Who first invented the lightbulb? Who invented the electric lightbulb fi...
The defoliants used in Agent Orange were discovered by botanist and bioethicist Arthur Galston in 1943, in conjunction with U.S. Department of the... Learn more about this topic: Agent Orange | Definition, Effects & History from Chapter 6/ Lesson 11 ...
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Around the same time, American inventors William Sawyer and Albion Man discovered that looping the light bulb filament helped it last longer, and patented a bulb incorporating this improvement. However, the filament support in their design prevented the filament from expanding and contracting as it h...
In my story, Captain Rosa Conroy is leading an expedition on a newly discovered planet that might be a good replacement for Earth, but there’s just one problem: the region they want to explore has sentient alien life, and the Captain’s superiors order her to raid the natives’ home. ...
s fluorescent tubes and the X-rays he had discovered. Equally fascinated, Clarence Dally took to the work enthusiastically, performing countless tests, holding his hand between the fluoroscope (a cardboard viewing tube coated with fluorescent metal salt) and the X-ray tubes, and unwitt...
I popped onto the Interwebs and discovered aYouTube channelperfect for my needs. It’s a certified trainer — and her 79-year-old mother — demonstrating simple exercises I can do in my limited space. If anyone had hinted a few months ago that I’d be looking forward every day to doi...
This is their capture of a crystal dragon that was discovered near the Wegner Quartz Crystal Mines in Arkansas last spring. Crystal dragons have the second hardest scales next to the Highlander dragon, hence the name, and they’re among the rarest dragons in history. As you can imagine, it...
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LED is the acronym for Light Emitting Diode. In 1907 the British engineer Henry J. Round discovered the phenomenon of electroluminescence (emission of...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...