Cetacean sleep

Cetaceans, or whales and dolphins, have a pretty unique way of getting some shuteye. These marine mammals actually only rest one half of their brain at a time when sleeping, in what is known as unihemispheric slow-wave sleep. While one hemisphere of the brain rests, the other remains alert. The hemispheres are alternated between sleep READ MORE

Facts on how whales and dolphins sleep

All animals need to sleep. Some of them are like humans and sleep during the night, others are nocturnal and sleep during the day. Pandas sleep more than 40% of the day. Whales and dolphins have special ways of sleeping. They need to always think about breathing since they are not conscious breathers like us READ MORE