Extreme Dive Durations of Baird’s Beaked Whale Push Mammalian Limits

It remains underwater longer than most humans can stay awake.

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Elite human free divers measure breath-hold time in minutes, not hours.

Baird’s beaked whales regularly complete dives lasting around an hour, dramatically exceeding human breath-hold capabilities and approaching the upper limits documented among mammals.

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During these prolonged submersions, heart rate slows and oxygen is rationed to essential organs, enabling survival in oxygen-deprived, high-pressure environments.

Such endurance redefines expectations of mammalian physiology and highlights the deep ocean as a domain where evolutionary extremes become routine biological function.

Source

Smithsonian Ocean Portal

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