WHAT ARE HARMONES?

HORMONES - Hormones have been called the 'chemical messengers' of the body. They are substances that regulate certain bodily functions such as, growth, development, reproduction, and metabolism. There are eight well-defined endocrine (or ductless) glands in the body. The main endocrine glands are the pituitary, thyroid, parathyroids, pancreas, adrenals, testes and ovaries. In all, they secrete at least 25 hormones into the bloodstream. The absence...

Read More

WHY DO TEARS COME OUT WHILE WEEPING?

TEARS - You must have noticed that whenever somebody weeps, tears begin to fall from his eyes. When someone is very happy even then come to his eyes. Do you know why it happens? When we blink our eyes, many muscles come into play and the eyelids close and open just like stage curtains. The movement of the eyelids is so fast that it does not disturb our vision. The blinking of the eyes is an involuntary action that takes place every six seconds...

Read More

WHICH IS THE MOST DANGEROUS BIRD IN THE WORLD?

DANGEROUS BIRD - The cassowary is the most dangerous bird in the world. Its inner toe has a long dagger-like claw that acts as a weapon and can slash open a man's stomach! the cassowary is found in New Guinea and Northern Australia. it is a secretive forest dweller and is seldom seen, but often heard croaking and bellowing. It can't fly but runs at a great speed on its powerful legs. On each foot, it has three toes, the inner one having a...

Read More

WHAT THE DIFFERENT TYPES OF RHINOCEROS?

RHINOCEROS - The name rhinoceros' has Greek origin. In Greek, rhino means 'nose' and keros mean 'horned'. The animal has one or more curved horns on its long nose. The horns grow throughout its lift. Rhinoceros belongs to the 'odd-toed' group of ungulates. Rhinoceroses are found in Africa and South-East Asia. The animal carries its large body on the four stouts, short legs. It has three toes on each foot, each toe ending in the separate...

Read More

WHY DOES DOG GO MAD?

DOG GO MAD -  Dogs are regarded as faithful animals and were probably among the first animals to be domesticated by man. But if it goes mad, it becomes very dangerous. A person who is bitten by a mad dog may die if not treated promptly and properly. A dog goes mad when it suffers from a disease called 'rabies'. This disease is caused by a virus, which is carried in air or by some wild animals and enter's the dog body through...

Read More

IS THERE ANY ANIMAL WHICH COMMITS SUICIDE?

SUICIDE - Lemmings are small, stout, grey or brown animals with short tails and small eyes. These mouse-like rodents live in the colder regions of Northern Hemisphere, such as the mountains of Scandinavia and Lap land. They are between 12 to 16 centimeters ( 5 to 6 inches) in length, with feet covered with fur for protection against cold. They make their nests both above the ground with dry grass and in burrows. They feed on roots, stalks,...

Read More

WHY DO WE DREAM?

DREAM -  We spend about one-third of our life in sleep. Sleep is essential for the good health of both mind and body. Sleep is a state of unconscious rest. Even the conscious part of the mind is totally at rest, the subconscious part of the mind continuous working and produces dreams. About five times during the night, we change from periods of deep sleep to periods of light sleep. And as morning approaches, the periods of light sleep...

Read More

WHY IS HARD TO WALK UPHILL THAN DOWNHILL?

 UPHILL THAN DOWNHILL - Generally while climbing up the stairs of a building, a person gets more easily exhausted, than while coming down. To lift heavy articles, greater effort is required. It is harder to walk uphill than downhill. Have you ever wondered why? We know that our Earth attracts everything towards its center. This is known as the force of gravity of the Earth. It is the force of gravity that holds us on the surface of...

Read More

WHY DO HOT THINGS BURN US?

THINGS BURN - An object is said to be hot if its temperature is more than our body temperature. If we touch such an object, heat flows from it to our body and we sense the difference in temperature. In case the object is hotter, it causes pain and may even burn our skin. Similarly, an object is said to be cold if its temperature is lower than our body temperature. When we touch it, heat flows from our body to the object. We know that our body...

Read More

WHY DO WOMEN HAVE A SWEET VOICE?

SWEET VOICE - You may have noticed that the voice of women is generally sweeter than that of men. Even boys have a feminine voice till the age of eleven or twelve years. But later it starts becoming deeper. the voice of girls, however, does not change much with age. Normally, the age between eleven to thirteen years is known as the puberty age. During this period, some of our glands produce sex hormones. These hormones bring many changes in the...

Read More

WHO IS BRIGHTER : GIRLS OR BOYS?

BRIGHTER - There is a difference of opinion on this question. People have various explanations; some say that girls are brighter than boys while others have the opposite view. Scientists have yet to establish a logical scale by which it can be established that one sex is smarter than the other. Here are some facts, which provide some insight into this question. The average brain weight of males is slightly more than that of females, and also...

Read More

HOW DID DIFFERENT SUPERSTITIONS BEGIN?

SUPERSTITIONS - Superstitions have played a unique role in the human life right from the beginning of civilization. Even today, we may find many people who are superstitious about different things. Do you know how different superstitions began? Ancient man could not explain various natural phenomena like thunder, lightning, and climatic changes. He knew little about the sun, moon, comets, and meteors. So he formulated his own theories...

Read More

HOW DID THE PRACTICE OF SHAKING HANDS BEGIN?

SHAKING HANDS - People shake hands more frequently today than they did a few hundred years ago. In ancient times, the hand was considered as a symbol of power and strength. Primitive man used it to kill animals or fight against his enemies. The extended hands were taken to be a gesture of goodwill and friendship by ancient people. The practice of shaking hands probably originated in ancient Greece. Greeks prayed before their gods...

Read More

HOW DID VARIOUS RELIGIONS ORIGINATE

RELIGIONS - You must have heard of many religions co-existing in the world today. But have you ever wondered how the major religions originated? It is difficult to say which religion was the first to originate. However, the story of their origin is very interesting. From the beginning of civilization, the man has been worshiping many powers in the hope that they could protect him from different threats in day-to-day life. The man has also been...

Read More

WHY DO PEOPLE GET MARRIED

MARRIAGE - Marriage is the legally & culturally sanctioned union of a man and women. The basis of marriage varies considerably in different societies. Why do people get married and how do marriages take place in different customs? In most marriage ceremonies, customs or contracts involve a set of rights & duties such as care and protection. The couple promise to love and care for each other as long as they live. They formally accept each...

Read More