Electricity
Even in very industrialized countries electricity only started becoming a reality in the late 19th century. Thomas Edisons invention of an inexpensive and reliable light bulb brought huge demand for electricity. This photo shows the massive amount of electrical wires in the early days of electricity - can you find the three differences in this photo hunt puzzle?
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The ability for a light bulb to brighten a room in the evening is a luxury that most people take for granted. The conversion from candlelight, oil lamps, and gas lights to electrical lighting was a huge breakthrough. |
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