Sep 26, 2012
16 Facts About Sleep #infographic
Posted by Irfan Ahmad Digital Information World Author Pakistan author profile Wednesday, September 26, 2012 info-graphics , Life-and-Health-Tips
Sleep is absolutely essential for every human being. Despite scientist still not figuring out the process entirely, we still know a lot about this daily activity. Every mammal, bird and most reptiles, amphibians and fish require sleep to function. Here are 16 thing you probably never know about sleep.