The article discusses the universal need for sleep among animals, including humans, birds, whales, and jellyfish. It highlights the risks associated with sleep, especially for vulnerable animals, and explores how different species have adapted their sleeping patterns to survive in extreme conditions. Research has revealed unique sleeping behaviors in animals like chinstrap penguins, frigatebirds, and elephant seals, showcasing the flexibility of sleep in response to ecological demands. Teljes cikk (Euronews.com)