In the 1962 movie Lawrence of Arabia, one scene shows an American newspaper reporter eagerly snapping photos of men robbing a damaged train. One of the robbers, Chief Auda abu Tayi of the Howeitat clan, suddenly notices the camera and snatches it. “Am I in this?” he asks, before smashing it open. To the dismayed reporter, Lawrence explains, “He thinks these things will steal his virtue. He thinks you're a kind of thief.”

As soon as colonizers and explorers began taking cameras into distant lands, stories began circulating about how native peoples saw them as tools for black magic. The “ignorant natives” may have had a point. When photography first became available, scientists welcomed it as a more objective way of recording faraway societies than early travelers' exaggerated accounts. But in some ways, anthropological(人类学的) photographs reveal more about the culture that holds the camera than the one that stares back. Up into the 1950s and 1960s, many ethnographer(人种学者) sought “pure” pictures of “primitive” cultures, routinely deleting modern articles for daily use such as clocks and Western dress. They paid men and women to re-enact rituals or to pose as members of war or hunting parties, often with little regard for truthfulness. Edward Curtis, the legendary photographer of North American Indians, for example, got one Makah man to pose as a whaler with a spear in 1915 — even though the Makah had not hunted whales in a generation.

    These photographs reinforced widely accepted stereotypes that native cultures were isolated, primitive, and unchanging. For instance, National Geographic magazine's photographs have taught millions of Americans about other cultures. As Catherine Lutz and Jane Collins point out in their 1993 book Reading National Geographic, the magazine since its founding in 1888 has kept a tradition of presenting beautiful photos that don't challenge white, middle-class American conventions. While dark-skinned women can be shown without tops, for example, white women's breasts are taboo. Photos that could unsettle or disturb, such as areas of the world torn apart by war or famine, are discarded in favor of those that reassure, to conform with the society's stated pledge to present only “kindly” visions of foreign societies. The result, Lutz and Collins say, is the display of “an idealized and exotic world relatively free of pain or class conflict.”

    Lutz actually likes National Geographic a lot. She read the magazine as a child, and its lush imagery influenced her eventual choice of anthropology as a career. She just thinks that as people look at the photographs of other cultures, they should be alert to the choice of composition and images.

    If you want to get something done, you might want to put your mobile phone back in your pocket. Researchers have found that the mere presence of a phone is distracting (分心) — even if it is not your own. And the devices (设备) are likely to distract you, even if they are not ringing or “pinging” with text messages. People asked to carry out electronic tests of their attention spans were found to perform worse when a mobile phone was present than other people performing in the presence of a paper notepad.

    Scientists from Hokkaido University in Japan said that their findings show that it is harder to concentrate when one of the electronic devices is present. The effect was most marked on people who are not regular users of phones. In tests on 40 undergraduates. Associate Professor Junichiro Kawahara and a colleague divided the subjects into two groups — one asked to carry out tests in the presence of an Apple iPhone next to a computer monitor, and the other in the presence of a notebook.

    The test involved asking the participant to search for a particular character among a mess of other characters on the screen. Researchers measured the time it took to find the target. The results of the experiment found that those with the mobile phone took longer to find the character, indicating that participants were automatically distracted by the presence of the phone. The researchers suggest that people are drawn to the presence of a mobile phone, although there are individual differences in how one attempts to ignore it. In conclusion. Professor Kawahara said. “The mere presence of a mobile phone was a distraction among infrequent internet users.”

    Another finding is that listening to one half of a mobile phone conversation also distracts people, and other studies have found that placing a mobile phone in view has a negative impact on the quality of face-to-face communications. Holding a mobile phone makes you less likely to get a fair hearing from others.

    “Can't hold a candle to” is a popular expression. When there wasn't electricity, someone would have a servant light his way by holding a candle. The expression meant that the person who cannot hold a candle to you is not fit even to be your servant. Now, it means such a person cannot compare or compete.

    Another expression is “hold your tongue.” It means to be still and not talk. “Hold your tongue” is not something you would tell a friend. But a parent or teacher might use the expression to quiet a noisy child.

    “Hold out” is an expression one hears often in sports reports and labor news. It means to refuse to play or work. Professional football and baseball players ''hold out” if their team refuses to pay them what they think they are worth.

    The expression “hold up” has several different meanings. One is a robbery. A man with a gun may say, “This is a hold-up. Give me your money.” Another meaning is to delay. A driver who was held up by heavy traffic might be late for work. Another meaning is for a story to be considered true after an investigation. A story can hold up if it is proved true.

    “Hold on” is another expression, which means waiting or stopping. As you leave for school, your brother may say, “Hold on, you forgot your book.” It is used to ask a telephone caller to wait and not hang up his telephone.

    Our final expression is “hold the line”. That means to keep a problem or situation from getting worse—to hold steady. For example, the president may say he will “hold the line on taxes”. He means there will be no increase in taxes.

    When you go to the doctor, you like to come away with a prescription．It makes you feel better to know you will get some medicine. But the doctor knows that medicine is not always needed. Sometimes all a sick person needs is some reassurance that all will be well. In such cases the doctor may prescribe a placebo.

    A placebo is a sugar pill, a harmless shot, or ail empty capsule. Even though they have no medicine in them, these things seem to make people well. The patient thinks it is medicine and begins to get better. How does this happen?

    The study of the placebo opens up new knowledge about the way the human body can heal itself. It is as if there was a doctor in each of us. The doctor will heal the body for us if we let it. But it is not yet known just how the placebo works to heal the body. Some people say it works because the human mind fools itself. These people say that if the mind is fooled into thinking it got medicine, then it will act as if it did, and the body will feel better.

    Placebos do not always work. The success of this treatment seems to rest a lot with the relationship between the patient and the doctor. If the patient has a lot of trust in the doctor and if the doctor really wants to help the patient, then the placebo is more likely to work. So in a way, the doctor is the most powerful placebo of all.

    A placebo can also have bad effects. If patients expect a bad reaction to medicine, then they will also show a bad reaction to the placebo. This would seem to show that a lot of how you react to medicine is in your mind rather than in your body. Some doctors still think that if the placebo can have bad effects it should never be used. They think there is still not enough known about it.

    The strange power of the placebo does seem to suggest that the human mind is stronger than we think it is. There are people who say you can heal your body by using your mind. And the interesting thing is that even people who swear this is not possible have been healed by a placebo．

    The ocean bottom, a region nearly 2.5 times greater than the total land area of the earth, is even today largely unexplored. Until about a century ago, the deep ocean floor was completely inaccessible and hidden beneath waters averaging over 3,600 meters deep. Totally without light and in the case of intense pressures hundreds of times greater than at the earth's surface, the deep-ocean bottom is a strange environment to humans, in some way, as fighting and remote as the outer space.

Although researchers have taken samples of deep-ocean rocks for over a century, the first detailed global study of the ocean bottom did not actually start until 1969, with the beginning of the National Science Foundation's Deep Sea Drilling Project(DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP's drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean's surface and drill very deep waters, taking samples of rocks from the ocean floor.

    The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, it sailed 600,000 kilometers and took almost 20,000 samples of rocks around the world. Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger's voyages, nearly all earth scientists agree on the theories of plate tectonics (构造学) and continental drift that explain many of the geological processes.

    The sample of rocks drilled by the Glomar Challenger has also provided a climatic record stretching back hundreds of millions of years. The information of past climatic change can be used to predict the future climate.

Do you continue to be healthy in social isolation? NASA is looking for people to spend 8 months locked in a Russian lab for a new experiment.

When humans go to the moon and travel to Mars, they will need to be prepared for long-term space travel and even longer stays on these far-off destinations. Currently, NASA's Artemis program aims to land humans on the moon for the first time since NASA's Apollo 17 mission landed in 1972.

While the moon is the main goal of NASA's Artemis program, the agency's larger goal is to send people to Mars. But long-term space travel and habitation won't be easy. Such missions will present both physical and mental challenges as astronauts work to not only survive, but perform important scientific research in uniquely difficult environments.

In the upcoming NASA-Russia experiment, a group of people will live in a closed facility at Russia's Institute for Biomedical Problems, which is in Moscow. This habitat facility was used in2011 for notable series of Russian mock (模拟的) Mars missions known as Mars 500. During these missions, groups of people spent 520 and 105 days on two separate missions in the facility.

The facility, according to the statement, will have "environmental factors similar to those astronauts are expected to experience on future missions to Mars". The group of people will spend 8 months living together in isolation and working on scientific research.

By living and working in this Mars-like environment, participants in this study will help NASA researchers better understand the psychological and physiological (心理和生理的) effects of isolation. These missions help researchers not only perform relevant science experiments but also see how people might get on under strange conditions for long periods of time.

So, if you're finding that living in social isolation works for you, you might be particularly well-suited for living in a Mars-like environment and this could be for you. But first, you have to qualify. NASA is looking for "highly motivated" Americans between the ages of 30-55, who must speak both Russian and English fluently and have a Master of Science, Doctor of Philosophy, Doctor of Medicine, or military officer training. Applicants with other related experience may also be considered. Those who are chosen to be a part of this group will be paid for their work.