555
가구
Today, Americans have tables and chairs in their kitchens and dining rooms that are usually made of wood. People also have large wooden cabinets in their dining rooms to hold dishes.
554
고기 아닌 고기
Several teams around the world are trying to produce meat without killing animals. So far the Dutch team appears to have made the most progress.
545
혁신의 비결
Simply put, innovation is doing something new that works. Steven Johnson has written a new book called "The Innovator's Cookbook." Mr. Johnson says all progress depends on innovation and creativity.
543
졸리운 아이들
Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of sixty to ninety minutes less than experts say they need.
542
3D 프린터
When we print something, a flat page comes to mind. For example, you might use a photocopier. Photocopiers print in two dimensions. Now, imagine how this would work for three dimensions.
541
운동
Exercise not only improves your appearance. It can also improve your health. Exercise helps to reduce the risk of some diseases. They include heart disease, stroke, type-two diabetes, osteoporosis and even some kinds of cancer.
540
소금은 적게
Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict how just three grams less a day would affect heart disease in the United States.
536
맹그로브 나무
Mangroves are unusual looking trees. They have roots that stand in saltwater and look like cables or ropes laid one on top of another. Mangroves are not just pretty -- they help the environment.
535
새와 관련된 표현
Today we explain some expressions about birds. For example, if something is for the birds, it is worthless or not very interesting. Someone who eats like a bird eats very little.
532
달콤한 컵케익
To some people, they are nothing more than a harmless treat or a guilty pleasure to enjoy from time to time. To others, they are enemies of the public health in a time of what the World Health Organization calls a "global obesity epidemic."