12
물은 얼마나 마시는 게 좋은가?
Many people believe they are supposed to drink eight glasses of water a day, or about two liters. Why? Because that is what they have been told all their life.
11
손을 자주 씻어야 하는 이유
Medical experts say the most effective way to prevent the spread of disease is for people to wash their hands with soap and water.
8
개도 꿈을 꾸는가?
Studies show that dogs and human beings have similar brain activity when they sleep. Researchers use a test called an electroencephalogram to study such activity.
7
미국 유학생
This week, we report comments from foreign students in the United States who have experienced the process we have been describing.