Read the passage. Get Your Zzzs If you've ever had a sleepless night, you know that a lack of sleep can make you feel sluggish. Yet failing to get a good night's sleep can also have more serious consequences. Sleep plays an important role in the process of learning new information. A lack of sleep reduces a person's ability to pay attention and concentrate, which makes learning more difficult. In addition, sleep is necessary for remembering information. In 2009, researchers discovered that brain patterns called sharp wave–ripple complexes consolidate memories—that is, fix them in the brain—and transfer them to long-term storage. These brain waves happen most often during the deepest phases of sleep. Thus, you may have a hard time remembering what you learned during the day if you don't get enough sleep. What is the main idea of the passage?
