잠
Sleep. It’s important to our mental and physical health. From a quick cat nap to long, deep beauty sleep, we have many expressions to describe sleep.

양봉
Bees make honey in their homes, known as hives, and beekeepers make money selling that honey.

비엔나
The Austrian capital, Vienna, is known for its museums, palaces and ease of living. The city of 2 million people was recently identified as having the world's highest quality of life.

나무 심기 경쟁
Sports are usually the way that countries compete with one another. However, there is another way countries around the world are competing for the top spot: planting the most trees.

차가운
Cold weather has a great effect on how our minds and our bodies work. Perhaps that is why we have so many expressions that combine the word “cold” with body parts.

야채가 뇌에 좋다
New research from the Rush University Medical Center in Chicago indicates your mother was right: eating vegetables is good for you.

칼스배드 플라워필드
The famous Flower Fields in Carlsbad, California is now open to the public.

부정 행위
Teachers have always had to deal with cheating students. But in today’s high-tech world, new devices are making it much easier for students to cheat.

인도의 달리트 계급
Dalits are members of India’s lower caste, or social class. The woman’s attackers were members of a higher caste. Beatings and other violence against Dalits are not new. What is new, however, is the community’s reaction.

아시아 음식
Korean-American filmmaker Grace Lee grew up in Columbia, Missouri. There were not many other Asian families in the university town in the Midwestern part of the U.S.

블루스
Blues, the lyrics are absolutely true. Sometimes good, sometimes bad, but they didn't lie. They're gonna sing about something they had actually experienced, or they knew somebody who did.

조폐
Guided tours of the Bureau of Engraving and Printing in Washington D.C. are a popular activity for visitors. These tours are a good way to learn new and interesting facts about the history of money and its complex production methods.

잡담
Small talk. Chitchat. These are the short conversations we have at parties, while we wait in line at the store, at family events or work.

쓸모없는 음식
I just ate a bag of potato chips, a couple of candy bars and two sodas. Are you kidding? That’s a lot of junk food. I thought you’re on a healthy diet!

흔해 빠진
Mary: Why not? I really need it. John: The store down the street has them at a dime a dozen! Come on, I’ll show you.

용돈
Many children first learn the value of money by receiving an allowance. Parents often give their children an amount of money that they may spend as they wish. The purpose is to let the children learn from experience...

추운 날씨에 달리기
A new study shows that the drop in temperature is a good reason to run. In fact, researchers say, running in cold weather helps improve one’s performance.

커피와 차
Now, many people are loyal coffee drinkers. They cannot imagine starting their morning without -- what some call -- a hot “Cup of Joe.” Some people hate coffee and prefer to drink tea.

계산기
Their first device could add, subtract, multiply and divide. It had twelve bytes of memory -- close to nothing compared to today's highly powerful calculators. And it weighed more than a kilogram.

아이비 리그
The Ivy League is a name for eight schools in the northeastern United States. All but one were established hundreds of years ago, when England had colonies in the area.