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ScienceSilicon Canalsabout 3 hours ago
Sperm whales sleep vertically near the ocean surfaceSperm whales sleep by floating vertically near the surface, motionless and silent for 10 to 15 minutes. Marine biologists first documented this behavior in 2008 using acoustic tags. The whales become completely unresponsive, with both brain hemispheres offline, leaving them defenseless during these brief sleep bouts.
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