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과학 자연 사람 역사 지구 우주 심리 발명

1 W-123  [러닝머신의 어두운 시작] The Dark History of the Treadmill The treadmill was invented in 1818 by Sir William Cubitt and was first used to punish prisoners. In English prisons, people had to walk on large paddle wheels. These wheels powered work like pumping w... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 2 W-108  [세계 첫 지하철] The World’s First Subway System London opened the world’s first subway on January 10, 1863. Many people first laughed at the idea, but Charles Pearson wanted underground trains to reduce heavy road traffic. Workers used the “cut... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 3 W-112  [세포 이론의 독특한 역사] The Strange History of Cell Theory Cell theory says all organisms are made of cells, cells are the basic unit, and new cells come from existing cells. Its history is not simple. In the 1600s, Zacharias Janssen may have made the first c... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 4 W-118  [백신의 시작과 작동 원리] How Vaccines Work In 1796, Edward Jenner made the first vaccine by using material from the cowpox virus. This protected a boy from smallpox. Vaccines work because they copy how the immune system fights disease. When a ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 5 W-120  [진공을 둘러싼 논쟁] The Debate About the Vacuum Aristotle said a true vacuum, or completely empty space, could not exist because nature would fill it. This idea lasted for 2,000 years. In the 1600s, miners found their pumps could not lift water hig... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 6 W-110  [원자력의 가능성과 위험] The Promise and Risks of Nuclear Power Nuclear power began in World War II when scientists in Chicago made a controlled chain reaction by splitting uranium atoms. This process turns nuclear mass into a large amount of energy. But nuclear p... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 7 W-101  [반창고의 탄생] How the Band-Aid Was Invented In the 1920s, Earle Dickson worked at Johnson & Johnson. His wife, Josephine, often got small cuts and burns while doing chores. The company’s large medical dressings were too big for her small inju... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 8 W-113  [프래킹의 과정과 논쟁] How Fracking Works and Why It Is Debated Fracking, or hydraulic fracturing, is a way to get natural gas from deep shale rock. A well is drilled down and then sideways through the shale. A perforating gun makes holes in the well casing. High-... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 9 W-106  [청바지의 탄생] How Jeans Were Invented During the Gold Rush in the 1850s, a tailor named Jacob Davis saw that miners wore out their pants very quickly. He got an idea and added metal rivets at stress points like pocket corners and the base... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 10 W-113  [빨대가 구부러진 이유] How the Bendy Straw Was Invented In the 1930s in San Francisco, Joseph B. Friedman was at a soda parlor with his daughter Judith. She could not reach her milkshake because the straight paper straw was too high. Joseph had an idea. He... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 11 W-114  [청진기의 시작] How the Stethoscope Was Invented In 1816, a doctor named René Laennec was walking in Paris when he saw two children using a wooden board to make sound louder. One child scratched one end, and the other listened. Later, Laennec had t... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 12 W-113  [화약의 발명과 영향] How Gunpowder Changed History Gunpowder was invented in 9th-century China by alchemists looking for an immortality potion. Instead, they made a flammable powder called “fire medicine.” Early Chinese users could not make it exp... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 13 W-107  [아스피린의 긴 여정] The Long History of Aspirin Aspirin’s story began 4,000 years ago when Sumerians learned that chewing willow bark reduced pain. Many cultures later used this natural remedy. Around 400 BC, Hippocrates also suggested willow bar... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 14 W-115  [면섬유의 힘과 부드러움] The Strength and Softness of Cotton Long ago, the Inca used cotton to make armor that was strong but still flexible. Cotton fibers grow on the surface of cotton seeds. Each fiber is one long cell with several cell wall layers. First, th... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 15 W-110  [전화기의 발명] The Invention of the Telephone The telephone is an important invention because it lets people talk from far away. Alexander Graham Bell is known for making the first working telephone in 1876. He taught deaf students and was intere... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 16 W-107  [자동차의 기본 구조] The Basic Parts of a Car A car is a machine people use to travel on roads. Most cars have four wheels, a metal body, and seats. They come in many colors and sizes, but all cars share basic parts. At the front, headlights help... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 17 W-115  [비행기는 언제 처음 날았을까?] When Did the First Airplane Fly? The first airplane flew in the early 1900s. Two brothers, Orville and Wilbur Wright, worked hard to make a flying machine. They lived in the United States and loved science and flight. After many test... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 18 W-132  [전구의 발명] The Invention of the Light Bulb The light bulb is an important invention because it helps people see in the dark. Many inventors worked on electric lights in the 1800s, but Thomas Edison is the most famous. He made a light bulb that... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 19 W-116  [종이의 발명] The Invention of Paper Long ago, people did not have paper. They wrote on stone, clay, or animal skins, which were heavy and hard to use. People needed something better. Over 2,000 years ago in China, paper was created. In ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 20 W-112  [냉장고는 어떻게 차갑게 만들까?] How a Refrigerator Stays Cold A refrigerator is a machine that keeps food cold and fresh. Cold air slows germs and bacteria, so food lasts longer. Inside the fridge is a special liquid called refrigerant. It moves through pipes an... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 21 W-124  [안경은 어떻게 눈을 도울까?] How Glasses Help Us See Glasses are tools that help people see clearly. Some eyes cannot focus well, so words look blurry or far-away things are hard to see. Long ago, people with poor vision had no way to fix this. About 70... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 22 W-122  [연필은 어떻게 만들어질까?] How a Pencil Is Made A pencil is a tool we use to write and draw. It looks simple, but it goes through many steps. The center of a pencil is not lead. It is a mix of graphite and clay. Graphite makes dark marks, and clay ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 23 W-125  [우산의 긴 역사] The Long History of Umbrellas Umbrellas help us stay dry in the rain and cool in the sun. People began using umbrellas thousands of years ago. More than 4,000 years ago in Egypt and China, umbrellas were used mainly for shade. Ric... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 24 W-119  [의자는 왜 이런 모양일까?] Why a Chair Is Shaped This Way A chair is something we use every day to sit. It usually has a flat seat, four legs, and a backrest. Long ago, people sat on the ground or on stones. Later, they made wooden stools with no backs. Thes... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 25 W-143  [지우개는 어떻게 글씨를 지울까?] How an Eraser Works An eraser is a small tool that removes pencil marks. We use it at school, at home, and at work. When you write, the pencil leaves graphite on the paper. Graphite is a soft black material that sits on ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 26 W-109  [텔레비전은 누가 만들었을까?] Who Invented the Television? Television lets us see pictures and hear sounds from far away. We watch shows, news, and movies with it. Many inventors helped create TV. One early inventor was John Logie Baird from Scotland. In 1926... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 27 W-109  [인터넷은 언제 시작되었을까?] When the Internet Began The internet is a big part of life today. We use it to find information, watch videos, send messages, and play games. The idea began in the 1960s. The U.S. government wanted a way to send information ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 28 W-111  [카메라는 어떻게 움직일까?] How a Camera Works A camera is a machine that takes pictures. People use cameras to save memories, make art, or show what they see. A camera has a lens that lets light enter. When you press the button, the camera captur... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 29 W-120  [자전거는 어떻게 움직일까?] How a Bicycle Works A bicycle is a simple machine that helps people travel without gas or electricity. It uses the power of your legs. When you sit on the bike and push the pedals, the pedals turn a chain. The chain is c... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 30 W-126  [로봇은 어떻게 일을 할까?] How a Robot Works A robot is a machine that can do work by itself. Some robots move, some talk, and some help people with jobs. Robots have four main parts: a body, sensors, a brain (computer), and motors. The body hol... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 31 W-125  [세탁기는 어떻게 옷을 깨끗하게 할까?] How a Washing Machine Works A washing machine is a machine that cleans dirty clothes. It saves time and energy by washing, rinsing, and spinning in one place. First, you put clothes, water, and soap into the machine. Inside is a... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 32 W-119  [커튼은 어떻게 시작되었을까?] The History of Curtains Curtains are cloths that hang over windows. They block light, give privacy, and help keep rooms warm or cool. Long ago, people did not have glass windows. They had open holes in the walls. To cover th... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 33 W-132  [현미경은 어떻게 작동할까?] How a Microscope Works A microscope is a tool that helps us see things too small for our eyes. With it, we can see cells, tiny bugs, and parts of plants. Most microscopes use lenses to make small things look bigger. A lens ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 34 W-111  [컴퓨터 마우스는 누가 만들었을까?] Who Invented the Computer Mouse? The computer mouse is a small tool that helps us move a pointer on a screen. We use it to click, drag, and open files. The first mouse was invented in 1964 by Douglas Engelbart in the United States. H... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 35 W-120  [연은 누가 만들었을까?] Who Invented the Kite? A kite is a light object made of paper, cloth, or plastic that flies with the wind. People fly kites for fun, festivals, and science. The first kites were made more than 2,000 years ago in ancient Chi... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 36 W-120  [지퍼는 어떻게 열리고 닫힐까?] How a Zipper Works A zipper is a small tool used on clothes, bags, and jackets. It helps things open and close easily. A zipper has two rows of teeth made of metal or plastic. Each tooth fits with a tooth on the other s... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 37 W-126  [치약의 역사] The History of Toothpaste Toothpaste is something we use every day to keep our teeth clean and healthy. It helps remove food, fight germs, and make our breath fresh. The idea of toothpaste is very old. Over 4,000 years ago, pe... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 38 W-121  [롤러코스터는 어떻게 움직일까?] How a Roller Coaster Moves A roller coaster is a fun ride that goes up high, drops fast, and twists on the tracks. At the start, a chain and motor pull the coaster up a tall hill. This uses energy to lift it. At the top, the co... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING © 2026 SPEAK TOWN ENGLISH - LINGUA LABS