I just read an interesting theory about why we dream. I read that we sleep so we can record and archive our memories from the day. If we do that, then maybe we are just thinking about the memories of which we are storing for later use. OFF-TOPIC: If anyone could explain exactly why we need sleep in detail, please post. Don't just say "we sleep because we need energy". I'd like some proof. Also, if we sleep because we need energy, then why do we eat and drink? Whats the longer anyone has stayed up continuously before? Anyone into cars, PM ME!