The Roman army used a sophisticated system of signals using flags and torches to communicate over long distances, sometimes covering up to 100 miles in a single day.
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Some historical reenactors meticulously recreate even the smells of a historical period, using period-appropriate ingredients and techniques for cooking and cleaning.
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The first commercially successful jigsaw puzzle was created in 1760s England, based on a map of the world, making it a surprisingly old form of entertainment.
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