If you live to be 75 years old, you will have spent approximately 25 years sleeping. The average 20 year old has spent 6 years sleeping. This might seem like too much time to spend asleep, but most of us also know what it feels like when we don't get enough sleep. What is the longest you have gone without sleep? What symptoms did you have? I was guilty of many all-night study sessions before big exams in college - have any of you ever stayed up too late studying or working on a project or paper? After reading about the effects of sleep deprivation, do you think it is a good idea to stay up late working on projects or studying? Why or why not? What could you do to improve your sleep and study habits?