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Elephant seals rest at sea in downward-diving "sleep spirals"

Elephant seals function on 2 hours of sleep per day, which they grab in 10-minute bursts on deep dives spiralling gently towards the sea floor. ....

United States , Pacific Ocean , Terrie Williams , Jessica Kendall , Institute Of Marine Sciences , Neurophysiology Lab , University Of California , Professor Daniel Costa , Marine Sciences , Santa Cruz , Professor Terrie Williams , Comparative Neurophysiology Lab ,