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Marine Biology

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Across
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It's what kept the water outside the bucket and air in.
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Used hallow tubes to breathe underwater
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Underwater breathing apparatus
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Hid in a barrel during the siege
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Developed by Jaque Cousteau and Emile Gagnan
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Goes back before 500 BC
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Number of pieces on the original Navy diving suit
Down
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Assisted in keeping the diver from rising back to the top
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Known as the father of scuba diving
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Material of first suit
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Standard Navy diving helmet was made of this
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Transported divers to depths of the ocean
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Designed suits to stay longer in the water