Some animals have evolved fascinating ways of resting, including the ability to sleep with their eyes open. This unusual adaptation serves many purposes, from remaining alert to predators to allowing certain physiological processes to continue. Here are ten animals that are known to sleep with their eyes open, showcasing how evolution has catered to the unique needs of each species. 1. Dolphins Dolphins are one of the most famous animals that sleep with their eyes open—or at least it appears […]
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