How much oil is there left in the world?

The world uses about 80 million barrels of oil per day to keep itself running. Based on this figure, scientists estimate that there may only be enough oil for another 100 years or so. Almost all of the world’s oil is found in the Middle East, with Russia, Saudi Arabia, and Iran contributing the most oil to the world.

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How does the United States’s size compare with that of other countries?

The United States has an area of 3.79 million square miles (9.83 million kilometers) and a population of more than 303 million people, making it the third or fourth largest country by total area, and third largest by land area and by population. The United States is one of the world’s most ethnically diverse nations.

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Why is Friday the thirteenth considered to be bad luck?

The number thirteen represents Judas, the thirteenth to arrive at the Last Supper. Friday by itself is unlucky because it was the day of Christ’s Crucifixion. Years ago, the British set out to disprove these superstitions. They named a new vessel HMS Friday, laid her keel on a Friday, and then sent her to sea on a Friday that fell on the thirteenth. The plan backfired: neither ship nor crew was ever heard from again. Then, of course, there’s Apollo 13.

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What are the world’s newest countries?

The world’s newest country is Kosovo, which declared independence from Serbia in February 2008. Before that, the newest country was Montenegro, which became a country in June 2006, after splitting off from Serbia. Since 1990, 28 new nations have come into being. Many of these emerged from the collapse of the Soviet Union (14 countries) and the breakup of the former Yugoslavia (7 countries).

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Why does smoke curl up in the air?

Smoke contains hot gases which being lighter in weight, follows a curved path because of the eddy currents that are set up in the air.

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Why do we say that a bad deal will only “Rob Peter to pay Paul”?

In the mid-1700s the ancient London Cathedral of St. Paul’s was falling apart, and the strain on the treasury was so great that it was decided that it would merge with the diocese of the newer St. Peter’s Cathedral in order to absorb and use their funds to repair the crumbling St. Paul’s. The parishioners of St. Peter’s resented this and came up with the rallying cry, they’re “robbing Peter to pay Paul.” Expressions

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Why doesn’t it hurt to cut my hair?

Haircuts don’t hurt because your hair is not alive. Hair is made out of a protein called keratin. Only the root of the hair—the part that grows inside the skin on your head from tiny holes called follicles—is alive and growing. So if you pluck out a hair by the roots, it hurts. But trimming or cutting your hair is painless. And that is also the same reason why it doesn’t hurt to trim your fingernails or toenails, which are also made of keratin. And because fingernails grow faster than toenails, you need to trim them more often!

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Why do zits always form in the middle of the forehead?

Acne, a red, irritating skin rash, that mostly affects children approaching puberty, usually appears in the oil-producing areas of the body. These include the face (forehead, nose, and chin), chest, and back. Hyperactive glands produce oil (sebum) at a faster than normal pace due to tweens’ rapid changes in hormone levels. Excessive oil clogs pores and creates acne, or pimples. Many times hair—which hangs down onto the forehead or sides of face—contains grease-like gels and styling products that contribute to acne.

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Why did dinosaurs become extinct?

Scientists do not know for sure why dinosaurs became extinct. They have many different theories, some of which explain the extinction as something that happened gradually over a long period of time. Other theories suggest that a single catastrophe, such as fallen asteroid from outer space, caused the dinosaur population to die off rather suddenly. And some scientists believe the dinosaur population had been gradually getting smaller and then was finished off by some dramatic event. Those who believe gradual changes brought about the dinosaurs’ end suggest that, as more and more mammals appeared, the dinosaurs had trouble competing with them for food sources. And these mammals may have eaten dinosaur eggs in such large numbers that fewer and fewer baby dinosaurs were born. Some experts believe that widespread disease killed off dinosaurs. Many suggest that gradual climate changes—from continuously warm, mild weather to seasonal variations with hot summers and cold winters—affected the dinosaurs. Scientists are not sure whether dinosaurs were warm-blooded or cold-blooded (and there may have been some of each). If they were cold-blooded, meaning that their body temperature changed depending on the temperature of their surroundings, it would have been difficult for such large animals to survive extreme temperatures. Smaller coldblooded creatures can burrow under the ground, for example, to escape both heat and cold. But most dinosaurs were simply too large to do that. The scientists who believe that dinosaurs became extinct after a major catastrophe point to evidence that suggests a huge asteroid, perhaps several miles wide, hit Earth. The impact of such an object would have created enormous clouds of dust and other debris. The heat of impact would have started fires over a great area. Between the dust clouds and the smoke from the fires, sunlight would have been blocked, maybe for several months. A lack of sunlight would have caused a dramatic drop in temperature, and much plant life would have died. Without plants, the plant-eating dinosaurs and many other animals would have died; without the planteating dinosaurs and those other animals, the meat-eating dinosaurs would eventually die as well.

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Why is a concise promotion called a “blurb”?

The word blurb, meaning an inspired recommendation, comes from an evening in 1907 during an annual trade dinner of New York publishers Where it was customary to distribute copies of new books with special promotional jackets. For his book, humorist Gelett Burgess caused a sensation with a cover drawing of a very attractive and buxom young woman whom he named “Miss Belinda Blurb.” From then on, any flamboyant endorsement would be known as a blurb.

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