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과학 자연 사람 역사 지구 우주 심리 발명

1 W-119  [동물의 군집생활] Why Animals Form Swarms Swarms happen when many animals, like locusts, birds, or ants, move together in one large group. There is no leader. Each animal follows simple rules. It goes in the same direction as others, stays cl... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 2 W-113  [식물의 방어 전략] How Plants Defend Themselves Plants cannot move, but they have many defenses to protect themselves. They use physical barriers like tough bark, waxy cuticles, thorns, and tiny hairs called trichomes. Some plants release chemicals... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 3 W-117  [동물의 수명 차이] Why Animals Live for Different Lengths of Time Animals live for very different amounts of time because of environment, body size, and genetics. A small worm called C. elegans lives only weeks. A bowhead whale can live 200 years, and a Greenland sh... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 4 W-135  [오대호의 중요성] The Importance and Problems of the Great Lakes The Great Lakes—Huron, Ontario, Michigan, Erie, and Superior—are huge freshwater lakes that cover parts of eight U.S. states. They hold almost 20% of the world’s surface freshwater. These lakes ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 5 W-123  [농약의 역할] The Role and Problems of Pesticides Pesticides have helped stop major farm disasters. For example, they could have helped with the potato blight that harmed Ireland in 1845. These chemicals control pests, weeds, fungi, and bacteria that... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 6 W-123  [사과 품종이 많은 이유] Why There Are Many Apple Varieties Many apple types in stores, like SnapDragon, Cosmic Crisp, and Granny Smith, come from long fruit breeding. There are over 7,500 apple varieties in the world. Farmers want apples that resist disease a... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 7 W-112  [야행성 동물이 밤에 잘 보이는 이유] Why Nocturnal Animals See Well at Night Nocturnal animals can see well at night because their eyes have special adaptations for low light. Some animals, like the tarsier, have very large eyes that let in more light. Cats have a reflective l... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 8 W-122  [가장 큰 단일세포 생물] The Largest Single-Celled Organism The largest single-celled organism is Caulerpa taxifolia, a green algae that can grow up to 30 centimeters long. Most cells cannot grow this big because their surface area cannot keep up with their vo... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 9 W-117  [식물의 소통 방법] How Plants Communicate Plants do not have nervous systems, but they can still communicate using chemical signals in the air and soil. When a plant is attacked, it releases volatile chemicals that nearby plants can detect. T... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 10 W-119  [고양이의 이상한 습관] Why Cats Behave the Way They Do Cats show behaviors that seem funny or strange, but these actions come from old instincts. Wild cats climbed trees to watch for prey, hunted small animals often, and kept their claws sharp. These inst... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 11 W-138  [에베레스트 산의 높이] Mount Everest’s Height Mount Everest is 8,850 meters above sea level, so it is the highest point on Earth. But it is not the tallest mountain from base to top; that title belongs to Mauna Kea. Everest became very high becau... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 12 W-137  [산불과 숲의 회복] Wildfires and Forest Recovery Wildfires can look harmful, but they are important for some forests, especially conifer forests in western North America. Some trees, like lodgepole pines, even need fire to grow new trees. They make ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 13 W-128  [눈송이의 독특한 구조] Why Snowflakes Are Unique Snowflakes are six-sided shapes made when water vapor turns directly into ice. This is different from ice cubes, which freeze from liquid water. Their six-sided form comes from the way water molecules... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 14 W-118  [돌고래의 지능과 감정] Dolphin Intelligence and Emotions Dolphins are very intelligent animals with large and complex brains. They live in strong social groups and communicate well. They also use tools, work together, and share learned skills. For example, ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 15 W-143  [오랑우탄 푸 만추] The Story of Fu Manchu and Orangutans Fu Manchu was an orangutan in a zoo, and he escaped many times. The keepers were confused until they learned he used a wire to open the lock. Orangutans are very smart. They live in forests and young ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 16 W-152  [고래와 바다의 균형] How Whales Keep the Ocean in Balance In 1891, people said a whaler named James Bartley was swallowed by a whale and lived for 36 hours. This story is probably not true, but it reminds us that the ocean is full of mysteries. Whales releas... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 17 W-136  [물고기의 놀라운 호흡] How Fish Breathe So Well In 2019, Eliud Kipchoge ran a marathon in under two hours and used twice as much oxygen as non-runners. But even he cannot breathe as well as a fish. Fish live in water with low oxygen, so they need v... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 18 W-130  [앵무새의 말 따라 하기] Why Parrots Can Copy Human Speech In 2010, a British parrot went missing and came back speaking Spanish. Many birds can copy sounds, but parrots do it very well. Wild parrots are social and use calls to stay connected, find mates, and... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 19 W-108  [유전자 구동과 모기] How Gene Drives Might Control Mosquitoes Mosquitoes are the deadliest animals for humans because they spread diseases like malaria. But only a few of the 3,500 species are dangerous. Scientists study gene drives to target these harmful mosqu... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 20 W-111  [신기한 코끼리 코] How Elephants Use Their Trunks An African elephant uses her trunk to explore her world. Her trunk can smell water far away and detect predators. Elephants live in herds led by a matriarch. These herds work together to survive, and ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 21 W-148  [커피 한 잔의 여정] The Journey of a Cup of Coffee A cup of coffee depends on the work of many people around the world. It begins in places like Pitalito, Colombia, where Coffea trees grow. Farmers pick coffee cherries by hand because the fruits ripen... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 22 W-126  [라플레시아 시체꽃] The Corpse Flower Rafflesia The corpse flower Rafflesia arnoldii grows in Southeast Asia and is the largest flower in the world. Some flowers are over one meter wide and weigh seven kilograms. It smells like rotting meat to attr... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 23 W-144  [가위개미의 새로운 시작] How Leafcutter Ants Start a Colony In Texas a leafcutter ant queen starts a colony with fungus in her mouth and tiny cockroaches under her wings. After mating, she drops her wings, digs a nest, and places the fungus inside. She feeds i... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 24 W-115  [하루살이의 삶] Life of Mayflies Mayflies are insects with a short adult life. They live only a day or minutes. They spend most of their lives underwater as nymphs, which are their young stage. They come out only to reproduce. Male m... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 25 W-119  [선인장이 살아남는 방법] How Cacti Survive Cacti live in deserts and tropical forests. They store water in thick stems and protect themselves with spines. These spines are special leaves with a small surface area, so they save water. The spine... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 26 W-116  [바다사자의 생존 기술] How Sea Lions Survive and Hunt Sea lions look lazy on beaches, but underwater they are fast hunters. They swim 4 to 18 miles per hour and can hunt for 30 hours. They dive 400 meters by squeezing their flexible lungs and ribs. They ... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 27 W-111  [범고래 모계 사회의 비밀] Killer Whale Families and Grandmothers Killer whales live in family groups called pods. These pods are led by elder females, or grandmothers, who can live over 80 years. They guide hunts and share important knowledge. Sons and daughters st... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING 28 W-113  [개의 놀라운 후각] How Dogs Use Their Powerful Sense of Smell Dogs experience the world through smell. Their wet noses catch scents in the air, and each nostril smells separately, helping them find a scent’s direction. Inside the nose, air splits into two path... E-BOOK K-BOOK VOCA COLC ORDER SPEAKING © 2026 SPEAK TOWN ENGLISH - LINGUA LABS