AnimalsThese birds nap while they fly—and other surprising ways that animals sleepAnimalsMany mammals are contagious yawners—this might be why.ScienceWant to reduce your COVID-19 risk? You need to sleep more.ScienceKids are having pandemic dreams tooAnimalsWe thought this bear was out cold. We were mistaken.AnimalsFascinating ways animals prepare for AutumnAnimalsThese slumbering fish may offer clues to the origins of sleepAnimalsIt’s not just hedgehogs: These hibernating animals may surprise youThese Bats Make Tiny Igloos to Survive the WinterPhoto GalleryExplorersHow to Sleep in Extreme Places
