english: And if you look at sleep and dreams biologically, animals sleep and dream, and they rehearse and they do some other things that help memory and that are a very important part of sleep and dreams.
non_english: A ako na spavanje i snove gledate  sa biološke strane, životinje spavaju i sanjaju, i one isprobavaju i rade druge stvari koje podstiču pamćenje, i ovo su veoma važni elementi spavanja i snova.