Ah, sleep. It’s something that’s essential to us all, but all too often elusive. Even with many leading scientists now dedicating their careers to the study of sleep, it remains a relatively mysterious field. Here are 26 things you may not know about something you do every night.

Numerous studies have determined that napping leads to behavioral and mood improvements. In some countries, businesses shut down in the middle of the day so employees can retreat home for a nap; in others, shut-eye is taken right at the desk. Companies in the U.S. are generally less nap-friendly, but the tide may be turning on that front.

Traveling is usually a cause for excitement. (Okay, unless it’s a business trip or visiting the in-laws.) But no matter what has you on the road or in the air, the fact remains that you want to feel your best while you’re away from home.

zom-bie 1 -  a person held to resemble the so-called walking dead. 2 - a person markedly strange in appearance or behavior If this sounds like it describes you, don't panic! You're probably not undead, but there's a good chance you're sleep deprived. Lack of sleep affects many aspects of your physical and mental health, which can leave you feeling...