12 lecturas adaptadas al nivel A1. Lee a tu ritmo y practica la comprensión con preguntas interactivas.
Why does an octopus have three hearts?
An octopus is an animal that lives in the sea. It has eight long arms and a soft body. It can swim, but it can also move along the sea floor.
One day, an octopus sees a large fish. The fish may want to eat it. The octopus hides under a rock. Its soft body can fit into very small places.
Here is something surprising: an octopus has three hearts. People have only one. Two hearts help send blood to the parts of its body that take air from water. The third heart sends blood to the rest of the body.
When the fish leaves, the octopus goes out to find food. It catches a small crab with its arms. Then it returns to its safe place under the rock.
The octopus has a very different body from ours. But, like us, it needs food, air, and a safe place to rest.
An octopus has a hard mouth called a beak. It uses the beak to eat. The rest of its body is soft. That is why it can hide in small spaces. It is a very unusual sea animal.
Mia goes to bed after a long day. She closes her eyes and falls asleep. Soon she starts to dream.
In her dream, Mia is flying over her town. She sees her school and the park. Then a pink cat starts talking to her. Everything feels real, even though it is impossible.
In the morning, Mia wakes up in her own bed. She remembers the cat, but she cannot remember how the dream ended.
Why do people dream? Scientists are still looking for a complete answer. We know that the brain stays active during sleep. Some dreams may be connected to things we see, feel, or think about during the day.
Not every dream has a special meaning. Sometimes dreams are simply strange stories made by our sleeping brain.
Mia tells her family about the pink cat. Everyone laughs. She hopes to see it again in another dream.
In the morning, Mia tells her dad about her dream. She saw a purple cat. The cat could talk! Her dad smiles. Dreams can be funny, and sometimes they can feel real.
A plane takes off from an airport. A girl sits by the window and watches the houses become smaller. Soon the plane is flying above the clouds.
Why do many planes fly so high? One reason is that the air is thinner high above the ground. This means the plane can move forward with less effort and may use less fuel.
Flying high can also help a plane avoid some bad weather. But it is not always a smooth flight. There can still be strong winds and moving air.
The sky is very cold at that height. There is also too little air for people to breathe normally. Inside the plane, special systems keep the air safe and the temperature comfortable.
The girl looks at the clouds below her. They look like white mountains. A little later, the plane begins to go down toward its next airport.
The people on the plane look out of the window. The houses look very small. Up high, the air is thin. The plane has strong wings and engines to help it fly safely.
Imagine living in Rome almost two thousand years ago. There are busy streets, shops, and many people, but no cars or phones.
Lucius is a young boy. In the morning, he eats bread and goes to the market with his mother. They pass people selling fish, fruit, and clothes. They also see workers carrying heavy things through the streets.
Many people in Rome get water from public places. Some rich families have large homes with water inside, but many other families live in small rooms.
Life is different for children too. Some go to school and learn to read. Others spend much of their day helping their families work.
In the evening, Lucius returns home for a simple meal. He talks with his family and gets ready to sleep. Rome is part of ancient history for us. For Lucius, it is simply the city where he lives.
Lucius goes to a busy market. He sees bread, fruit and people selling things. Later, he walks past a big place where people can wash. Life in Rome is not like life today.
In a forest, a tall tree grows next to a small one. Both trees need sunlight, water, and food from the ground.
Trees have roots under the soil. The roots take in water and important things that help trees grow. But roots are not always working alone.
Very small living things called fungi can live near tree roots. They help trees take in some things from the soil. In return, the fungi receive food from the trees.
Scientists are studying how trees and fungi are connected. Sometimes food can move between plants through these connections. But this does not mean trees talk or think like people.
A forest is a busy place, even when it seems quiet. Birds live in the branches, insects move on the ground, and many tiny living things work below it.
The next time you see a tree, remember that there is a lot happening where you cannot see.
The tree needs water and sun. Its roots are under the ground. Some tiny living things grow near the roots. They can help the tree get food from the soil. Trees do not talk like people.
Many adults begin their morning with a cup of coffee. But coffee does not start in a cup. It comes from a plant.
The coffee plant grows fruit. Inside the fruit are seeds, which people often call coffee beans. Workers collect the fruit and take out the seeds. The seeds are dried and heated until they turn brown.
People then break the roasted beans into small pieces and mix them with hot water to make coffee.
Coffee has a long history. The plant comes from Africa, especially the area that is now Ethiopia. Over time, coffee drinking spread to other parts of the world.
Today, cafés are popular meeting places in many countries. Some people drink coffee with milk, while others prefer it black.
It is interesting to think that a drink found in cities around the world begins with a small seed inside a fruit.
A coffee plant has fruit. Inside the fruit are seeds. People take out the seeds and make them dry. Later, they heat the seeds. These are the beans used to make coffee.
Some nights, the Moon looks like a bright circle. On other nights, it looks like a thin smile in the sky. Does it really change shape?
No. The Moon stays round. What changes is the part of its bright side that we can see from Earth.
The Moon does not make its own light. The Sun shines on it. As the Moon travels around Earth, we see different amounts of the side lit by the Sun.
These changes happen in a regular pattern. After about one month, the Moon looks nearly the same again.
A brother and sister decide to watch the Moon every evening. They draw its shape in a notebook. At first, it is a thin curve. Later, it becomes bigger and brighter.
Their drawings help them see something important: the Moon has not changed size. Only the way it looks from Earth has changed.
The Moon looks different on different nights. Sometimes it looks round. Sometimes we see only a little part. The Moon is still the same. We see light from the Sun on it.
A small bee flies from flower to flower. It takes sweet liquid from the flowers and carries it home. This liquid is called nectar.
Many bees live together in a hive, which is their home. Inside, the bees work together to turn nectar into honey. They help remove much of the water from it.
Honey is sweet and thick. It can stay good for a very long time when it is stored properly. One important reason is that honey contains very little water. Most tiny living things that make food go bad cannot grow easily in it.
Bees make honey as food for themselves. People also collect and eat honey, often with bread or in tea.
Making honey takes a lot of work. A bee visits many flowers, then returns home. Other bees help with the next steps.
A jar of honey may look simple, but it comes from many small trips and a lot of teamwork.
The bees bring sweet food back home. They work together. After some time, they make honey. Honey is very sweet. We can eat it, but a baby under one year old must not eat honey.
Anna is shopping when she hears an old song. She stops and smiles. She has not heard it for years, but she knows it very well.
Suddenly, she remembers a summer day at the beach with her family. She can almost feel the warm sun and hear the waves. The song was playing that day too.
Why can music bring back memories? Our brains connect sounds with feelings and experiences. When we hear a familiar song, those connections can help us remember a person, place, or moment.
Sometimes the memory is happy. Other times, a song can remind us of something sad. Music often has a strong connection to how we feel.
Anna goes home and plays the song for her sister. Her sister remembers the same holiday, but she remembers different details.
One short song has helped two people return, in their minds, to a day they enjoyed years ago.
Anna hears a song she knows. She thinks of a happy day at the beach. She remembers the sun and her family. A song can help us think of a time from the past.
A wide river runs through a town. People need to get from one side to the other, so they build a bridge.
Every day, people walk across it. Cars and buses use it too. Some of these vehicles are very heavy. How does the bridge hold them?
A bridge is built to move weight through its strong parts and down to the ground. Some bridges have tall supports under them. Others use curved shapes or strong cables to help carry the load.
The people who design bridges are called engineers. They choose materials such as steel and concrete and work out how much weight the bridge must carry.
Bridges also need regular checks. Rain, wind, and years of use can damage them.
A girl crosses the bridge on her way to school. She may not think about the work behind it, but many people have helped make her journey safe.
The bridge is strong. People walk over it. Cars can go over some bridges too. People who build bridges must make sure they are safe. Bridges can look very different.
In a very cold part of the world, a penguin stands on the ice. Snow blows around it, but the penguin can stay warm.
Penguins are birds, although they cannot fly. Instead, they are excellent swimmers. They dive into the sea to catch fish and other small sea animals.
Their bodies have special ways to keep warm. They have many feathers that sit close together, and a layer of fat under the skin. Both help protect them from the cold.
Some penguins, such as emperor penguins, also stand close together in large groups. This helps them stay warmer when the wind is strong.
Young penguins need extra care. Their parents help protect them and bring them food until they can do more for themselves.
Life on the ice is difficult, but penguins have bodies and habits that help them survive.
The penguin has many feathers. They help it stay warm. It cannot fly in the sky, but it can swim fast. Some penguins stand close to other penguins when the wind is very cold.
Open a map in a book or on your phone. North is usually at the top. It feels normal, but there is no rule of nature that says maps must look this way.
Earth is round. In space, it has no true top or bottom. People choose how to show the world on a flat page.
In the past, mapmakers in different places used different directions at the top of their maps. Some placed east or south there. Over time, maps with north at the top became common in many parts of the world.
Today, people often learn to read maps this way. It makes maps easier to compare when they follow the same pattern.
A boy uses a map to find a park near his home. He checks which way is north, then follows the streets on the map.
The most important thing is not which direction is at the top. It is knowing how to read the map.
The map helps us find places. On many maps, north is at the top. But you can turn the map around. The roads and towns do not move. A map is a picture we use to find our way.