How Do Sperm Whales Keep Their Massive, Wax-Filled Heads Beneath the Waves as They Sleep?

So, at the ocean surface, sperm whales ( Physeter macrocephalus) are positively buoyant. Yet, somehow, they rest in a ...

Secrets of how sperm whales sleep revealed

Sperm whales are able to hang vertically in the water while sleeping by releasing gas bubbles that regulate their buoyancy, ...

Sperm whales release bubbles to regulate buoyancy and sleep floating vertically, scientists discover

Sperm whales can hang vertically in the water while sleeping by releasing gas bubbles that regulate their buoyancy, ...