Sleep is very, very good. And while it's essential to get a solid seven to nine hours per night, when you occasionally miss the mark, a nap can help a great deal. Hey, it's still a good idea even if you do get enough sleep. 睡眠是非常非常好的，...
The Science Of The Siesta When you go back to work or class after lunch, why is it so hard to stay awake? Although we get energy from food, we also use lots of energy to digest it. Your energy use increases 25-50% as you digest a meal. With all that...
