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This is the first time swimming was seen in the Olympics.

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On this date, was the first time the swimming Olympic events used an electric timer. Before they would use a small watch, but that was not very accurate.

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On this date, swimming outside in the ocean was banned because of the tides and possible diseases.

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This was the first time speedo released it's new swimsuit that allows you to swim faster.

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In 1932, the Japanese created underwater cameras so that the audience could see what was going on underwater.

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In 1934, it was discovered that keeping your hands underwater increased drag when pushing your hands forward before the pullout. Instead due to analysing through the use of technology, it was discovered that by taking your hands out of the water would reduce drag and increase speed.

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In 1950, speedo introduced a new swim suit which was made from nylon and rubber. They found through rigorous testing that nylon suits reduced friction in the water allowing for faster times. They also made tighter suits reducing drag in the water.

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This date was when the first person used goggles in the Olympics.