4 Sleep Patterns You Probably Didn't Know About (Infographic)
Sleep is, understandably, an obsession for many people; you have to get some every day (usually), and it's frequently interrupted or lower quality than it should be.
To complicate matters, it turns out there are phases of sleep previously unknown to most people! Thankfully, the good people at Sleep Matters created an infographic that explains everything. Prepare to have your eyes opened — if you aren't ready for bed, that is.