How do volcanoes erupt?

A volcano is a natural opening in Earth’s crust through which lava (hot molten, or melted, rock), gases, steam, and ash escape, often in a big, noisy eruption or explosion. These eruptions are thought to act like safety valves, relieving the enormous heat and pressure that exist deep in Earth’s interior. A volcano is usually a coneshaped mountain (its sides built up from solidified lava and ash) that has a hole or crater in its center through which it vents. There are several different kinds or stages of eruptions, many causing no damage to the places or people located near the volcano. But a few eruptions are huge and destructive. During these, lava can pour out and run down the volcano into surrounding areas, and enormous suffocating clouds of steam, ash, hot gases, and shooting rock can travel downhill at great speeds, covering many miles.

How did we start celebrating Mother’s Day?

In 1907 Miss Anna Jarvis of West Virginia asked guests to wear a white carnation to the church service on the anniversary of her mother’s death. But Mother’s Day became increasingly commercial, and Miss Jarvis spent the rest of her life trying to restore its simplicity.

The strain of her efforts to stop Mother’s Day and what it had become led her to an insane asylum, where she died alone in 1948.

Where did the rude Anglo-Saxon one-fingered salute come from?

When the outnumbered English faced the French at the Battle of Agincourt, they were armed with a relatively new weapon, the longbow. The French were so amused that they vowed to cut off the middle finger of each British archer. When the longbows won the day, the English jeered the retreating French by raising that middle finger in a gesture that still means, among other things, “in your face.”

My pet iguana was tiny and now it’s more than 3 feet (0.91 meters) long! What happened?

If cared for properly, green iguanas can live more than 20 years. But they do indeed grow
and grow along the way. Although iguanas make popular pets, they need lots of time, attention, care, and room to grow. A healthy iguana will grow to be 5 to 6 feet (1.5 to 1.8 meters) in length, and will require a very large cage or an entire room to live in. Iguanas need tall cages because they are tree-dwelling (arboreal) creatures, and prefer to spend the majority of their time as high off the ground as possible. Iguanas also need a special diet, plenty of sun, places to climb, and human interaction and stimulation.

What is CERN in LHC?

CERN is a French Space Agency French acronym for (European Organization for Nuclear Research) and was in news due to LHC experiment recently.

Why does a lizard need to lie in the sunshine to get energy?

The lizard is a reptile, a cold-blooded animal that is unable to internally control its own body temperature. In order to warm up or cool down, lizards and other reptiles—such as snakes, turtles, and crocodiles—move to different areas of their environment. They also use certain other behavioral traits to keep their body temperatures constant. For instance, if a lizard is starting to feel the intensity of the tropical sun, it might head into the shade or take a dip in a pool of water. The same lizard might also bask in the sun to warm up. Frilled dragons and collared lizards run on their hind legs in the heat of the day, making an artificial breeze to help cool themselves off. And another reptile, the crocodile, holds its jaws open to cool down on hot days.

The blood vessels in its mouth are close to the skin surface, and help transfer heat. Lying quietly is another technique the crocodile uses to warm its body and help digest its food. Because they are cold-blooded, reptiles can survive on much less food, compared to warm-blooded small mammals and birds, which burn much of their food to keep warm.

Why is Earth mostly crater-free compared to the pockmarked Moon?

Earth is more active, in terms of both geology and weather, which makes it hard for craters to remain. Even those craters scientists can see on the surface—which may be millions of years old—have been overgrown by vegetation, weathered by wind and rain, and changed by earthquakes and landslides. The Moon, meanwhile, is geologically quiet and has almost no weather, so its hundreds of thousands of craters are easy to see.

The craters are the result of both meteorites and volcanic activity. Interestingly, some of the oldest Earth rocks might be awaiting discovery on the Moon, having been blasted there billions of years ago by asteroid impacts that shook both worlds.

Why are there wars?

Wars have taken place since the beginning of recorded history, and they surely occurred before that as well. A war begins when one group of people (the aggressors) tries to force its will on another group of people, and those people fight back. War frequently springs from the differences between people, or from the desire of one group to increase its power or wealth by taking control of another group’s land. Often the aggressors feel that they are superior to the group they want to dominate: they believe that their religion, culture, or even race is better than that of the people they wish to defeat. This sense of superiority makes them feel that it is acceptable to fight to take the land, possessions, and even lives of the “inferior” group, or to force their ways on the dominated people.

Because countries can be very different from one another in government, religion, customs, and ideology (ways of thinking), it is not surprising that nations disagree on many things. But great efforts are usually made to settle the disagreements through discussion and negotiation—a process called diplomacy—before they result in anything as destructive as a war. War usually occurs when diplomacy fails. Because science and technology have allowed us to create such powerful and destructive weapons that can result in such devastating wars, we now have international organizations that work all the time to try to keep peace among nations.

Why do Christians place their hands together in prayer?

The original gesture of Christian prayer was spreading the arms and hands heavenward. There is no mention anywhere in the Bible of joining hands in prayer, and that custom didn’t surface in the church until the ninth century. In Roman times, a man would place his hands together as an offer of submission that meant, “I surrender, here are my hands ready to be bound or shackled.” Christianity accepted the gesture as a symbol of offering total obedience, or submission, to God.

What does it mean to “rest on your laurels”?

The practice of using laurels to symbolize victory came from the ancient Greeks. After winning on the battlefield, great warriors were crowned with a wreath of laurels, or bay leaves, to signify their supreme status during a victory parade.

Because the first Olympics consisted largely of war games, the champions were honoured in the same manner: with a laurel, a crown of leaves. To “rest on your laurels” means to quit while you’re ahead.