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Sperm whales sleep upright
There are many mysteries surrounding the creatures that live in the ocean.
Unlike on land, continuous observation is difficult in the ocean, and much remains unknown about lifespans and social structures.
Even sperm whales, the largest mammals on Earth, have a wide migration range from high latitudes to the equator and have the amazing ability to dive to depths of 3,000 meters despite being lung-breathing creatures, so opportunities to see them alive are limited.
Sperm whales are shrouded in mystery, but did you know that a unique sleeping position was discovered in recent years?
Sperm whales do not have any adult males, and live in families of around 10 whales, mainly consisting of females.
The group was spotted sleeping in an "upright position" near the surface of the water.
Whales sleep in a type of "hemispheric sleep" in which half of the brain is rested at a time, so they never sleep completely like humans do, but they do spend about one to two hours a day in this position.
Unlike on land, continuous observation is difficult in the ocean, and much remains unknown about lifespans and social structures.
Even sperm whales, the largest mammals on Earth, have a wide migration range from high latitudes to the equator and have the amazing ability to dive to depths of 3,000 meters despite being lung-breathing creatures, so opportunities to see them alive are limited.
Sperm whales are shrouded in mystery, but did you know that a unique sleeping position was discovered in recent years?
Sperm whales do not have any adult males, and live in families of around 10 whales, mainly consisting of females.
The group was spotted sleeping in an "upright position" near the surface of the water.
Whales sleep in a type of "hemispheric sleep" in which half of the brain is rested at a time, so they never sleep completely like humans do, but they do spend about one to two hours a day in this position.
