I mean, it's pretty obvious that sleep deprivation is unhealthy; you can feel its effect pretty quickly. But look at this cool infographic about sleep deprivation!
Click on the image to see its full size.
Lol, I found it on Google Images when I was trying to find an accurate pic of my sleep deprived/dazed self. I really want to stop feeling tired. :/
I also found out that I sleep in a bad position. Apparently the fetal position causes lots of problems for you in the long run. At least I'm not the only one who sleeps incorrectly and am part of the majority who sleeps around 6-7 hours every night. :P