Why is a private detective called a “private eye”?

In 1850, the Pinkerton Detective Agency opened in Chicago with the slogan “We never sleep,” and its symbol was a large wide-open eye. Pinkerton was very effective and criminals began calling the feared operation “the eye.” Raymond Chandler and other fiction writers of the 1930s and 1940s simply embellished the underworld expression by introducing “private eye” as a description for any private investigator.

Posted on Categories General

What Polygraph instrument does?

Instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure and respiration used as a lie detector

Posted on Categories General

Do people still mine for gold in America?

Yes. Yet unlike a few centuries ago, gold panning today is primarily a recreational activity. Gold nuggets are found in areas where lode deposits and erosion have occurred—for example, in streams, rivers, ravines, and lake areas. All you need is a gold pan, a shovel, and a lot of patience. Both gold mines and gold prospecting sites exist in national parks from near Montgomery, Alabama to Washington, D.C. In addition, North Carolina, South Carolina, Georgia, Virginia, and Alabama have many gold mines and prospecting sites.

These states were America’s main source of gold for 45 years before the California Gold Rush of 1838, when gold was discovered at Sutter’s Mill in Coloma, California. Its news spread like wildfire, resulting in some 300,000 people coming to California to pan for gold. In California, the five counties of Mariposa, Tuolumne, Calaveras, Amador, and El Dorado—nicknamed the “Mother Lode”—still have gold for discovery. In 1837, the U.S. government established gold coin mints in Georgia and North Carolina to avoid transporting the raw gold to the U.S. Mint in Philadelphia, where coins are made.

What do you put in a toaster?

The answer is bread. If you said “toast”, then give up now and go do something else. Try not to hurt yourself. If you said, “bread”, go to question two.

Posted on Categories General

How powerful are astronomers’ telescopes?

Before Lippershey and Galileo, magnification instruments had not been used to investigate objects beyond Earth. Since their time, far more powerful visiblelight telescopes have been developed along with other types of telescopes capable of “seeing” invisible forms of radiation, such as infrared, ultraviolet, radio, X-ray, and gamma-ray. Today’s optical telescopes (made from glass, lenses, or mirrors) are 100 million times more sensitive than Galileo’s telescope. For example, Hawaii’s twin Keck Tele scopes are the world’s largest optical and infrared telescopes. Each stands eight stories tall and weighs 300 tons.

The Hubble Space Telescope, named after astronomer Edwin Hubble and launched into space in 1990, orbits Earth at a speed of 5 miles (8 kilometers) per second, and beams images back to Earth. Because its position is above the atmosphere (which distorts and blocks the light that reaches Earth) it is able to view the universe more thoroughly and clearly than ground-based telescopes.

Why do we say “either fish or cut bait” when we mean “make up your mind”?

There are two main jobs on a fishing boat. One is to “cut bait,” which means to prepare or cut “junk” fish for a hook, or for “chum,” which is dumped in the water to attract other fish. The second job is to do the actual fishing. So the admonition “Either fish or cut bait” doesn’t mean either fish or cut your line; it means make up your mind and decide which job you’re going to do, and just do it.

Posted on Categories General

How can I get a baby brother instead of a baby sister?

There is no way specific way to place an order for a baby brother or a baby sister. The gender (boy or girl) of a baby is determined by whether the father’s fertilizing sperm has an X or a Y chromosome. An X chromosome will lead to a girl, and a Y to a boy. (Mothers always contribute an X chromosome.) Although scientific methods are available to help parents organize their chromosomes and take advantage of the fact that the “boy” sperm has less DNA than “girl” sperm, they can be expensive and unreliable. One method, called the Shettles method, recommends that if parents want a girl, they should plan to make a baby right around the time of ovulation.

At this time, the egg is as far away as possible from the incoming sperm so the long-distance runners of the sperm world, the X sperm, have a better chance of making it to the egg. For a boy, the method suggests that parents plan to make a baby about two to four days after ovulation. That way, the short-distance sprinting Y sperm can make it to the egg first. Many doctors say that although this method is based in science, it is no guarantee that a couple will have a baby boy or a baby girl.

Why is the ocean salty?

Today, about 3.5 percent of ocean water is salt. When planet Earth was still young, its atmosphere contained a mix of hydrogen chloride, hydrogen bromide, and other gasses from volcanoes. Oceanographers (scientists who study the ocean) believe that some of these gases dissolved in the early ocean, making it salty.

Today, however, most of the salt in the oceans comes from rain. Rain falling on the land dissolves the salts in eroding rocks, and these salts are carried down the rivers and out to sea. The salts accumulate in the ocean as water evaporates to form clouds. The oceans are getting saltier every day, but the rate of increase is so slow that it hard to measure. If the oceans suddenly dried up, there would be enough salt to build a 180-mile- (290-kilometer) tall wall around the equator.

How do statues of men on horses tell how the rider died?

Statues of horse and rider are exclusively of monarchs or great warriors and are usually found in places of honour. The tradition is that if the horse is depicted with all four hooves on the ground, the rider died of natural causes. If one hoof is raised, the rider’s death came later from wounds incurred during battle, and if two hooves are in the air, the rider portrayed in the statue died on the battlefield.

Posted on Categories General