Why we sleep?

Of all the articles I have posted, this by far is the most interesting to me, because it is a topic in which I have high interest in? I came across an article which covers some hypothesis that seems credible and logical to me, on why we sleep. For years numerous of hypothesis were proposed on why we sleep but it isn't until now, scientist have propose an hypothesis that compliments common sense. The article reveals that we sleep to forget things--as the memory bank can only store a certain amount thus, when we sleep we forget something in order to make space to learn new things. https://www.nytimes.com/2017/02/02/science/sleep-memory-brain-forgetting.html?rref=collection%2Fsectioncollection%2Fscience&action=click&contentCollection=science&region=rank&module=package&version=highlights&contentPlacement=9&pgtype=sectionfront

http://www.sleepreviewmag.com/2017/02/purpose-sleep-forget-scientists-say/