Which dinosaurs inhabited Asia? Many dinosaur remains have been found in Asi Oviraptor, which was the size of a wolf, was found in the Gobi desert in Mongolia. The duck-billed dinosaur, Shantungosaurus, was 12 m tall and lived in China.
Do sheep grow wool every year? In spring, when the weather is warm, the sheep’s wool is sheared off It comes off like a hide and is then rolled up. The wool is used to make yarn. The wool on the sheep’s body regrows like...
Why do flies rub their legs together? A fly’s body and legs are covered with several bristly hairs. Dirt gets trapped in these hairs. By rubbing the legs together, the fly gets rid of the dirt. The dirt gets scraped off when it rubs its...
What is Venus made of? Venus and Earth are probably similar. Though it has no oceans it has a hard, rocky crust. Venus is very hot so water cannot remain as a liquid. Under the crust is a mantle of heavier rock. There is a...
What is Esperanto? Esperanto is a planned or constructed language that was invented during the period, 1877-1885. It was invented by a Polish doctor called L.L. Zamenhof. The language was intended for use between people who speak different native languages like French, English, German, Russian,...
What are antibodies? Harmful bacteria produce toxins or poisons when they enter our bodies. These toxins cause deadly diseases. To counter these toxins, our body produces certain substances. These are called antibodies. They can nullify the harmful effects of the toxins. Antibodies are specific for...
Why do hot air balloons rise up? Hot air balloons are filled with helium. Air inside the balloons are heated with gas burners. This hot air is lighter than the surrounding air and helps the balloons rise. The balloons land when the hot air is...
What is caffeine? Caffeine is a substance found in coffee beans. It is a stimulant and in its chemical properties it has a close relation to uric acid. Caffeine does not exist in a free state. It is always combined with acids. Adding milk to...
What is amnesia? Amnesia is a condition in which people forget things. It is usually a reaction to emotional stress and pain. The person who suffers from amnesia forgets not only the cause of his anxiety but also many other things. Sometimes the amnesiac will...
What is radiotherapy? Radiation can be dangerous if one is exposed to it for too long. But it has its uses too especially in the treatment of the dreaded disease, cancer. In radiotherapy, ionizing radiation is used to control or kill malignant cells. It works...
