We *Are* Aquatic Mammals
August 25, 2014 9:28 AM Subscribe
This Is What Happens To Your Heart When You Dive Into The Sea
Human blood has a chemical composition 98% similar to seawater. An infant will reflexively breaststroke when placed underwater and can comfortably hold his breath for about 40 seconds, longer than many adults. We lose this ability only when we learn how to walk.
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