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  1. Katie Ledecky Balancing Chocolate Milk on Her Head While Swimming

    Katie Ledecky Balancing Chocolate Milk on Her Head While Swimming

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  2. German swimming pool testing AI lifeguards _ World DNA _ WION

    German swimming pool testing AI lifeguards _ World DNA _ WION

    13
  4. Marine scientists measure the heart rate of the blue whale and it's astonishinglylow

    Marine scientists measure the heart rate of the blue whale and it's astonishinglylow

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