입이 가벼우면 화를 부른다
This wartime expression warned people in the military as well as ordinary citizens to watch what they say.

번개
Lightning is a powerful force of nature. In fact, a lightning strike carries millions of volts of electricity.

MP3
An MP3 is a kind of file used for sending music or other material over the Internet. These files are compressed, or reduced in size, compared to songs on a compact disc, or CD.

치아를 재생시키는 약
A dentist usually treats a cavity by removing the damaged part of the tooth. Then they fill the hole with porcelain or a combination of silver and other metals.

실험실 스테이크
An Israeli company says it has produced the world’s first steak “grown” in a laboratory.

몸짓 언어
We communicate most commonly, of course, with our words. But we also speak with our bodies. We call it body language.

자기 자리로 돌아가
Many years ago, in many places around the world, people used horses to get around.

호기심이 지나치면
This week we talk about another expression Americans usually get wrong. That expression is: Curiosity killed the cat.

뇌도 운동이 필요해
Immediately after training, individuals who were trained on memory or individuals who were trained on reasoning or speed showed significantly higher performance than those who received no training.

갠지스 강
The Ganges stretches over 2,700 kilometers across India. It begins high up in the Himalayan Mountains and eventually empties into the Bay of Bengal.

북극 눈에서 발견되는 플라스틱
Scientists say they have found high levels of small plastic particles in Arctic snow.

새로 개봉된 영화가 정말 많네
There are so many new movies out. I have no idea which movie to watch. Do you? 새로 개봉된 영화가 정말 많네. 어떤 영화를 봐야 할 지 모르겠다. 넌 어때?

쥐
Today we will be talking about a hated but misunderstood animal -- the rat. The sight of a rat might frighten you. Or it might make you sick to your stomach.

핫도그에서 애플파이까지
A hot dog is usually made from pork, the meat of a pig. Or it is made from beef, the meat of a cow. Another version is made from turkey. A vegetarian version of a hot dog has no meat at all.

사고난 자동차
Here in the United States, an insurance company will declare a car a total loss after an accident if it would cost more to fix it than the car is worth. They pay off the car's owner, then often they sell the wrecked car at a salvage auction.

수소 트럭
People in Switzerland may see some very large, hydrogen-powered trucks on the road this month.

언어와 두뇌
A new study of the brain is helping scientists better understand how humans process language. The study is being done in San Diego, Boston and New York.

아마존 동물과 셀프카메라
Visitors to the Amazon rain forest in South America face different rules for how they can interact with wild animals.

서커스
During the civilization of ancient Rome, the circus was a building for large events. These included horse racing, athletic competitions and wild animal hunts.

반짝 성공
Today we will talk about how to describe something that shows promise of being great, but then turns out to be…not so great.