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A new study reveals that elephant seals take insomnia to new depths, sleeping only about two hours a day while foraging at sea.
Elephant Seals Take Extreme Power Naps in the Open Ocean, Smart News
Elephant seals, the mammals that sleep the least: two hours a day in 10-minute naps, Science
Elephant Seals Wandering through Time and Place
Northern elephant seal, Animals
Neil the 600kg seal stops Tasmanian woman going to work after taking nap in front of her car, Tasmania
Elephant Seals Take Extreme Power Naps in the Open Ocean, Smart News
Seals skip sleep at sea to escape shark attacks
Seals uncover new ocean depths in East Antarctica - Institute for Marine and Antarctic Studies
Risk versus reward on the high seas – skinny elephant seals trade safety for sustenance
Seals have REM Sleep Spirals at Sea
Learning To Swim, Elephant Seal Style - Natural Reserve System