Euclid (c. 300 BC) **

Euclid was a Greek mathematician who is often called the "Father of Geometry." He lived in a time when mathematics was just beginning to be organised into a proper system. While he didn't discover all the rules himself, his greatest gift was organizing them. He collected all the known geometry and number theory of his time and wrote them down in a very clear and logical way in his most famous book, *The Elements*. This book was so good that it was used as a standard textbook for over 2,000 years! He taught at the great university in Alexandria, Egypt.

Story: The Coin for the Student

Long, long ago, in the bustling city of Alexandria in Egypt, there lived a very smart man named Euclid. He was a Greek mathematician, and he loved shapes, lines, and angles more than anything in the world. People call him the **Father of Geometry** because he was the first to write down all the rules about them in a famous book.

Euclid was also a teacher. He ran a school in Alexandria where young men came to learn the secrets of numbers and shapes. But Euclid was a special kind of teacher. He wasn't just interested in making his students memorise facts; he wanted them to understand *why* things were true.

One afternoon, a student raised his hand with a sigh. "Master Euclid," he complained, "I don't see the point of all this. What use are these triangles and circles? I can't buy bread with them. How will learning this ever help me get rich or have an easier life? I am learning, but I gain nothing from it."

The other students went quiet, and everyone looked at Euclid. Euclid didn't get angry. He just smiled a small, knowing smile. He quickly called his helper over and whispered something in his ear. The helper nodded and hurried away.

A moment later, the helper returned and placed a shiny coin in the student's hand.

The student was confused. "What is this for?"

"Because," Euclid said gently, "you must make a gain out of what you learn. If you cannot see the gain in knowledge itself, then let this be your gain for today's lesson."

The student blushed. He looked at the small coin in his hand, and then at his teacher. Suddenly, he felt a little silly. He realised that the real gain from learning wasn't a coin, but the power of understanding. Euclid was teaching them that geometry isn't just about lines and shapes; it's about learning how to think, to reason, and to measure the world. The very word "geometry" comes from the Greek words "geo" (Earth) and "metron" (measurement), because it first began as a way to measure land. The student went back to his work, and the coin became a reminder that the greatest treasures are the ones you find in your mind.

…

Fun and Fun

 Fun and Fun

 

1. Giant Tube Worms

In 1976, scientists found strange animals on the floor of the Pacific Ocean. They saw a beautiful landscape that looked like chimneys expelling dark-colored water—often called “black smoke.” The water coming out is nearly 400°C. Around these chimneys live unique giant tube worms. These strange animals can be 8 feet tall. They have no mouth and no digestive tract. Bacteria living inside the worms make food for them. Millions of shrimp are also found near the vents.

2. Black Smokers

On the floor of the Pacific Ocean are vents, or cracks. Seawater seeps down into Earth’s crust through the vents. The water is heated by magma below the crust until it boils. It expands and rises back to the surface through the same vents. The hot water dissolves minerals and other chemicals in the rocks. When it reaches the ocean floor, the water is dark. Some minerals harden on the rim of the vent. Over time, the rim builds up into a tall chimney. The dark color of the water coming from these vents gives them the nickname “black smokers.”

3. Atolls

What are atolls? When a volcano erupts in the ocean, it forms an island. Coral animals build reefs around the island. Over thousands of years, the reefs keep growing while the volcanic island sinks or erodes, leaving behind a ring-shaped reef called an atoll. The largest atoll in the world is Kiritimati, also called Christmas Island, in the Pacific Ocean. It is part of Kiribati and has its own flag and postage stamps.

4. The Great Barrier Reef

The Great Barrier Reef is the world’s largest coral reef system. It runs along the northeastern coast of Australia and is about 1,500 miles long. It can be seen from space. Nearly 6,000 species of animals live on the barrier reefs. Barrier reefs are made by groups of tiny coral animals living together. When corals die, they leave behind stony skeletons, which accumulate to form a reef.

5 Our Ancient Ancestors

While describing the fossil record, Charles Darwin wrote that the crust of the earth is a vast museum. For about 150 years, paleontologists have been searching that collection. Recently, many fossils have been collected from a valley in Ethiopia whose sediments span 6 million years. One of the masterpieces is a 4.4-million-year-old skeleton of *Ardipithecus ramidus*, one of the oldest and most complete early human relatives. It predates Lucy by 1.2 million years. “Ardi” is a four-foot-tall female skeleton. Ardi was at home in trees, but she also walked upright. This fossil finding filled a big gap in human history.

6. Icy Bodies

When solid lumps of carbon dioxide—dry ice—fall into water and warm up, they make swirling, misty patterns. Most frozen things warm up from solid to liquid and then to gas. Dry ice changes straight from a solid into a gas: it sublimes. As lumps of dry ice sublime, jets of cold gas shoot out. This makes the lumps spin around, creating a beautiful pattern of swirling. Sublimation is a process in which a solid changes directly into vapor.

Fun Extras

- **Lions:** A lion’s roar can be heard from several miles away.

- **Zebras:** Zebras can sleep standing up, but they often lie down for deeper sleep.

- **Giraffes:** Giraffes sleep very little compared with most mammals—often in short naps.

- **Elephants:** Wild elephants can get by on surprisingly little sleep.

- **Horses:** The leg-locking system that lets horses doze standing up is called the “stay apparatus.”

- **Giant tube worms:** Their red plume contains hemoglobin, the same oxygen-carrying molecule that makes human blood red.

- **Black smokers:** The water is about 400°C but does not boil at that depth because of high pressure.

- **Atolls:** An atoll is a ring-shaped coral reef, often surrounding a lagoon.

- **Great Barrier Reef:** Coral looks like rock, but it is made by living animals called polyps.

- **Ardi:** Ardi’s skeleton suggests she could climb in trees and walk upright.

- **Dry ice:** The fog from dry ice is mostly condensed water vapor in the air, not carbon dioxide gas itself.

Lincoln’s Legal Advice: Try Honesty Instead

 

Lincoln’s Legal Advice: Try Honesty Instead
Lincoln’s Legal Advice: Try Honesty Instead

Abraham Lincoln was honest in all walks of life—an inconvenient trait in a lawyer, perhaps, but one he refused to abandon. While practising law, he was approached by a man carrying a case he wanted Lincoln to take. Lincoln refused it outright, having concluded that the man was a cheat. A poor widow, left with six children to rear, had inherited $600 from a relative; this man proposed to deprive her of the sum—a plan that was legally ambitious and morally about as attractive as a mud bath.

Lincoln looked at him severely—the sort of look that could make a dishonest client reconsider his entire business model—and said: “Do you want me to help you make that honest woman’s life miserable? Imagine her plight if you were to deprive her of the little support she has got. Humanity is higher than law. I would advise you to earn this amount in some more honest way.”

These words had the desired effect. The man felt thoroughly ashamed of himself and went away—presumably to seek employment less creative than robbing widows. Lincoln, meanwhile, had once again proved that honesty is the best policy, even when it costs a lawyer a fee and saves a client from himself.

Fun About Animals

Fun About Animals 

1. Why Is the Lion in Such Trouble?

Lions need lots of room to survive. A single lion pride may require about 260 square kilometers of good hunting land. Areas that large are becoming rare as lion habitat is sliced up by roads, farms, ranches, and towns. Lions are also threatened by hunting and poaching. To save lions, we must protect the places where they live.

Lions live in groups called prides. Lions work together to raise cubs. Some pride members hunt alone, while others hunt in teams of two or more. Female lions seek medium-sized prey; males seek extra-large prey such as buffalo and giraffe. Cubs weigh about 3 pounds at birth, start eating meat at about three months old, and become independent by about two years of age.

2. How Does a Zebra Sleep?

A zebra lies down, often on its side, and sleeps very soundly. Another zebra will stay awake to watch for lions and other predators.

3. How Does a Giraffe Sleep?

A giraffe takes only short naps. It may sit and rest for hours, but it rarely sleeps more than a few minutes at a time.

4. How Does a Lion Sleep?

A lion sleeps and rests off and on for much of the day and night. If food is plentiful, a lion may sleep and rest up to 20 hours a day.

5. How Do Elephants Sleep?

Elephants are light sleepers. They must stay on the alert for predators. Elephants sleep a maximum of about four hours per day and night, and this is not in one stretch. They may sleep for 30 minutes, get up for something to eat, and then lie back down. Herds do not all sleep together, and they do not even sleep at the same time.

6. How Do Horses Sleep?

Horses do most of their sleeping standing up. Their legs can lock, which enables them to doze without falling over. Deep sleep, however, is usually done lying down. Horses also take naps at times.

The Coin For The Student.

 

Story: The Coin for the Student

Long, long ago, in the bustling city of Alexandria in Egypt, there lived a very smart man named Euclid. He was a Greek mathematician, and he loved shapes, lines, and angles more than anything in the world. People call him the **Father of Geometry** because he was the first to write down all the rules about them in a famous book.

Euclid was also a teacher. He ran a school in Alexandria where young men came to learn the secrets of numbers and shapes. But Euclid was a special kind of teacher. He wasn't just interested in making his students memorise facts; he wanted them to understand *why* things were true.

One afternoon, a student raised his hand with a sigh. "Master Euclid," he complained, "I don't see the point of all this. What use are these triangles and circles? I can't buy bread with them. How will learning this ever help me get rich or have an easier life? I am learning, but I gain nothing from it."

The other students went quiet, and everyone looked at Euclid. Euclid didn't get angry. He just smiled a small, knowing smile. He quickly called his helper over and whispered something in his ear. The helper nodded and hurried away.

A moment later, the helper returned and placed a shiny coin in the student's hand.

The student was confused. "What is this for?"

"Because," Euclid said gently, "you must make a gain out of what you learn. If you cannot see the gain in knowledge itself, then let this be your gain for today's lesson."

The student blushed. He looked at the small coin in his hand, and then at his teacher. Suddenly, he felt a little silly. He realised that the real gain from learning wasn't a coin, but the power of understanding. Euclid was teaching them that geometry isn't just about lines and shapes; it's about learning how to think, to reason, and to measure the world. The very word "geometry" comes from the Greek words "geo" (Earth) and "metron" (measurement), because it first began as a way to measure land. The student went back to his work, and the coin became a reminder that the greatest treasures are the ones you find in your mind.

 

Napoleon’s Will—and His Secretaries’ Exhaustion

One of Napoleon’s favourite maxims was: “The truest wisdom is a resolute determination.” His life demonstrated, more vividly than most, what a powerful and unscrupulous will could accomplish—preferably before breakfast and without asking permission. He threw the whole force of his body and mind directly upon his work, with roughly the delicacy of a cannonball. Imbecile rulers and the nations they governed went down before him in succession, which was one way of simplifying the map of Europe and ruining everyone else’s dinner plans.

He was told that the Alps stood in the way of his armies. There should be no Alps, he said; and the road across the Simplon was duly constructed through a district formerly almost inaccessible. “Impossible,” he declared, “is a word to be found only in the Dictionary of Fools”—and one suspects he had checked the edition personally. He was a man who toiled terribly, sometimes employing and exhausting four secretaries at a time. He spared no one, not even himself—a policy that must have made him exhausting to be near and impossible to schedule for a quiet nap. His influence inspired other men and put new life into them. “I made my generals out of mud,” he said—a remark that sounds less like military doctrine and more like a complaint about the weather.

…

 

Archimedes (c. 287 – 212 BC)

Archimedes was a brilliant Greek mathematician, physicist, engineer, inventor, and astronomer. He is famous for discovering the value of **pi** (π), which helps us measure circles, and for his story about the golden crown, which led to the famous "Eureka!" moment. He was a master inventor who created amazing machines, like the Archimedes screw (a device to lift water) and powerful weapons to defend his city of Syracuse. He is considered one of the greatest scientists in history, and his work in mathematics and physics was far ahead of his time.

Story: The Golden Crown and the Bathtub

Archimedes was one of the greatest mathematicians and inventors of ancient Greece. He lived in a city called Syracuse, and his mind was always buzzing with ideas about levers, pulleys, and the wonders of the universe.

One day, the King of Syracuse received a beautiful new crown, made by a goldsmith. But the king was a suspicious man. He had given the goldsmith a lump of pure gold, and he worried that the smith had secretly kept some gold for himself and mixed in cheaper metal, like silver. The crown looked perfect, but was it pure? The king wanted to know without melting or breaking his beautiful new crown.

He called for Archimedes. "You are the smartest man in my kingdom," the king declared. "Find out the truth! Tell me if my crown is pure gold or a fake!"

Archimedes thought and thought, but he couldn't find a way. He couldn't melt the crown to test it, because the king wanted it unharmed. He paced back and forth, frustrated.

A few days later, Archimedes decided to take a bath to clear his head. He filled the tub to the very top with water. As he stepped in, he noticed something that he had seen a thousand times before: the water splashed over the sides and ran onto the floor.

But this time, he really *saw* it. A huge smile spread across his face. He jumped out of the tub, his eyes wide with excitement. "I have found it! I have found it!" he shouted, running home.

**"EUREKA! EUREKA!"** (which means "I have found it!" in Greek).

He was so excited that he forgot all about his clothes and ran through the streets of Syracuse completely naked, all the way to the king's palace!

He had discovered that an object placed in water will push out a certain amount of water. This amount of water, he realised, is equal to the object's own volume. So, he could take a piece of pure gold the same weight as the crown and dunk it in water. Then he could dunk the crown. If the crown was pure gold, it would push out the same amount of water. If it was mixed with a lighter metal like silver, it would have to be bigger in size, and therefore, it would push out *more* water!

Archimedes had solved the puzzle! He could now tell the king the truth about the crown without breaking it.

Archimedes was also a great showman. He once said, **"Give me a long lever, and a place to stand, and I will move the whole world."** He wasn't being boastful—he was explaining the awesome power of levers! He was so confident in his inventions that he even said, **"Give me a place to stand on, and I will move the Earth."**