There's no denying that sleep is essential for good health and well-being. Unfortunately, our ever-increasing load of responsibilities -- from work and kids to cooking and laundry -- leaves us little time for shuteye. On the whole, though, people enjoy sleeping and feel more energized after getting a sufficient amount of it. Here are a few fun facts about sleep from the National Sleep Foundation: Exercising regularly makes it easier to fall asleep and contributes to sounder sleep. However, exercising sporadically or right before going to bed will make falling asleep more challenging. Man is the only mammal that willingly delays sleep Divorced, widowed and separated people report more insomnia Newborns sleep a total of 14 to 17 hours a day on an irregular schedule with periods of one to three hours spent awake Most healthy adults need seven to nine hours of sleep per night. However, some individuals are capable of functioning without drowsiness or sleepiness after as little...