Dolphins can swim and think for days without rest or sleep

If only we were as "advanced" as Dolphins --

Dolphins able to sleep with half their brains, stay awake for two weeks straight - CSMonitor.com: "The scientists found these dolphins could successfully use echolocation with near-perfect accuracy and no sign of deteriorating performance for up to 15 days. The researchers did not test how much longer the dolphins could have continued. "Dolphins can continue to swim and think for days without rest or sleep, possibly indefinitely," Branstetter told LiveScience. These findings suggest that dolphins evolved to sleep with only half their brains not only to keep from drowning, but also to remain vigilant. "These majestic beasts are true unwavering sentinels of the sea," Branstetter said. Future research can help verify whether the dolphins stayed awake and alert for multiple days by sleeping with half their brains. This would require monitoring their brains for electrical activity via electroencephalogram, or a EEG."

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