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The solution to the need for air in order to remain underwater dates back at least to the 7th—6th century B.C. Later special pneumatic chambers were built that were described by Aristotle. As for the snorkel, this idea came from the elephant who could walk on river beds by keeping his proboscis outside of the water. The rest was learned slowly and without too much difficulty since the first diving-suit and the first underwater military units are from the Roman Era.
KeywordsScuba Diver Pressure Tank Float Line Roman Writer Underwater Obstruction
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