Sara Mednick

β€œSleep is one of our basic functions, and it is important because being awake is very energy-consuming, and it's very stressful,” says Sara Mednick, Ph.D., a [professor of cognitive science] at the Mednick Sleep and Cognition Lab at the University of California, Irvine. β€œSleep helps us learn what we've experienced during the daytime, keep the ideas that we want and let go of a lot of information that we don't need, and then make connections between our new experiences and what we know about the world.”

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