Researchers agree that optimum napping time is between fifteen minutes and two hours. During a nap that’s shorter than fifteen minutes, you never enter the most restful phase of sleep. But if you sleep for over two hours, you might not be able to fall asleep when you turn in for the night.
If you chew gum with sugar in it, you need to chew for twenty minutes or more in order to produce enough saliva to wash away a significant amount of the sugar residue. Even then, it’s a good idea to brush your teeth afterward.
What can emotions have to do with smoking? Find out on today's Moment of Science.