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Elephant Seals Take Power Naps During Deep Ocean Dives - The New York Times
You think you need more sleep? Tell that to an elephant seal
Seals have REM Sleep Spirals at Sea
Elephant Seals Take Power Naps During Deep Ocean Dives - The New York Times
Elephant Seals Take Extreme Power Naps in the Open Ocean, Smart News
Seals have REM Sleep Spirals at Sea
Brain activity of diving seals reveals short sleep cycles at depth
Mapping uncharted undersea volcanoes, and elephant seals dive deep to sleep, Science
Risk versus reward on the high seas – skinny elephant seals trade safety for sustenance
Fear Shapes Feeding And Resting Strategies For Migrating Elephant Seals - Natural Reserve System
Sleeping elephant seals fall through ocean's depths, and some even nap on the sea floor
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