Is bedtime just a time for dreaming? Do our brains turnoff for the night? What if I told you that scientistsrecently discovered that our brains may be just as busyat night as they are during the day?
While we sleep, our brains are doing much more thangetting ready for the next day. Researchers at theUniversity of Rochester found that the brain may bebusy cleaning house -- cleaning out harmful waste materials.
As with many studies, the researchers turned to mice for help. They studiedmice that had colored dye injected into their brains. They observed the micebrains as they slept and when they were awake. The researchers say theysaw that the brains of sleeping mice were hard at work.