A new study led by an international team of biologists has identified some of the brain chemicals that allow seals to sleep with half of their brain at a time according to Science daily.
The study was headed by scientists. It identified the chemical cues that allow the seal brain to remain half awake and asleep. Findings from this study may explain the biological mechanisms that enable the brain to remain alert during waking hours and go off-line during sleep.
"Seals do something biologically amazing -- they sleep with half their brain at a time. The left side of their brain can sleep while the right side stays awake.