Dolphins Sleep With Half Their Brain Awake. So Why Don't They Drown?

Dolphins breathe air, and breathing is not something they can switch off the way we do when we fall asleep. So how do they sleep at all without drowning? The easy answer is that they sleep with only half of the brain at a time, but that is not quite right, because the full story is stranger and the researchers still disagree on parts of it. You will see how scientists first recorded the sleeping brains of dolphins, why one eye stays open while the other closes, what happens to mothers and newborn calves that barely sleep for weeks, and what a US Navy test says about how long dolphins can stay alert. The video is honest about what is still unknown, including how much we can say about wild dolphins from animals studied in captivity. If you like everyday questions explained simply, subscribe to Darnlo for more. #Dolphins #Sleep #Darnlo