Every living being has a unique sleeping pattern, with humans typically requiring seven to nine hours of sleep per night
Birds are unihemispheric sleepers, allowing them to sleep while flying, and some can stay airborne for up to six months
Dolphins engage in both deep sleep and lighter naps, with deep sleep occurring in a stationary position where they float like logs in the water
Sharks must remain in motion even while sleeping to ensure water flows through their gills for breathing, with some preferring to sleep facing strong currents
Snakes sleep with their eyes open due to the absence of eyelids, instead having transparent 'spectacles' to protect their eyes
Elephants are among the few animals that can sleep while standing, doing so to protect themselves from threats
World Sleep Day is celebrated annually on the Friday before the March Equinox to raise awareness of sleep-related issues and promote good sleep habits
The World Sleep Day Committee of the World Sleep Society has been organising this event since 2008