Sperm Whales Blow Bubbles to Sleep Standing Up β And It Might Be Smarter Than Anything We’ve Engineered
Sperm whales sleep vertically in the open ocean, and they do it by blowing bubbles from their blowholes. But the bubbles aren’t just for buoyancy β they may double as an acoustic camouflage and sensory alarm system, turning unconscious vulnerability into passive defense. It’s a multifunctional survival strategy that predates human engineering by millions of years.