Why diving marine mammals resist brain damage from low oxygen

No human can survive longer than a few minutes underwater, and even a well-trained Olympic swimmer needs frequent gulps of air. Our brains need a constant supply of oxygen, particularly during exercise.

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<p><a href="http://www.physorg.com/news117268844.html">Why diving marine mammals resist brain damage from low oxygen</a></p> <p>No human can survive longer than a few minutes underwater, and even a well-trained Olympic swimmer needs frequent gulps of air. Our brains need a constant supply of oxygen, particularly during exercise.</p>