Harper Lee, whose 1961 novel To Kill a Mockingbird on the racial troubles of the American deep south, has died at the age of 89.

    Until last year, Lee had been something of a one-book literary legend. To kill a Mockingbird sold more than 40 million copies around the world and earned her a Pulitzer prize, remaining a towering presence in American literature. Another novel, Go Set A Watchman, was controversially published in July 2015 as a “sequel” to Mockingbird, though it was later confirmed to be Mockingbird's first draft.

    But from the moment Mockingbird was published to almost instant success, the author consistently avoided public attention. Lee had lived for several years in a nursing home near the house in which she had grown up in Monroeville, Alabama—the setting for Maycomb of her famous book. Her neighbor for 40 years, Sue Sellers, said, “She was such a private person. All she wanted was privacy, but she didn't get much. There was always somebody following her around.”

    James Naughtie, BBC Books Editor, commented on the novels of Harper Lee: “I think she stands, particularly among American readers, as someone who shone a light into a very dark place. She was writing at a time when people were beginning to lift the lid on everything in the South which they'd chosen not to understand. That all changed in the 1960s. So I think her status for writing that book in its extraordinarily direct way will remain.

    Parents often think that time spent with their kids will gradually decrease in adolescence. But a new study suggests that while teens try to avoid spending a lot of time together with their parents, private parent-child meetings may actually increase in their early adolescent years. And that may raise a teenager's self-esteem (自尊) and social confidence, especially if it is the time that spent with Dad, the researchers added. The researchers created a long-term study in which they invited families in 16 school districts in central Pennsylvania to participate. In each family, a teenager, a younger sibling (兄弟姐妹), their mother and their father were interviewed at home and then asked about their activities and self-worth five times over a period of seven years.

    The study authors were surprised to discover that when fathers spent more time alone with their teenagers, the kids reported they felt better about themselves. Something about the father's role in the family seemed to improve self-esteem among the teenagers in the study, said study co-author Susan McHale, a professor of human development at Pennsylvania State University.

    “Time with Dad often involves joking, teasing, and other playful interactions. Fathers, compared to mothers, were more involved in leisure activities and had more peer-like interactions with their children, which is crucial for youth social development,” the study showed. But Marta Flaum, a psychologist in Chappaqua, New York, said, “How these findings reflect the real world is a real question. The sample in the study is so small and so unrepresentative of most families in the country today that I'm not sure how much we can generalize from it. In my community in Westchester County, I don't see parents and teenagers spend much time together at all. Parents are often working so hard and have less time to be together with their kids.”

    However, Flaum encourages parents to make time for their kids no matter how much work they have to do. “Research like this reminds us of how important it is. The time we have with them is so short,” she said.

Drinks Have No Wings

    You may have heard that "Red Bull gives you wings". But while most people take the advertising slogan as a metaphor(隐喻), some Americans seem to have taken it very seriously.

    Benjamin Careathers had been drinking the drink for 10 years, expecting to at least feel more energetic, but nothing happened. Feeling fooled by the ad, he took the issue to court.

    In October, the Austria-based company agreed to pay $ 6.5 million (39.7 million yuan) to customers who have bought the drink since 2002. People in the US can apply for a share through energydrinksettlement.com before March 2015.

    But is the case really that ridiculous?

    Red Bull said they had done nothing wrong and they only paid the money to save the cost and trouble of legal action.

    However, the suit(诉讼) told a different story. Even though there is no evidence that Red Bull energy drinks provide more benefit for consumers than a cup of coffee, the company markets their products as a superior source of energy that costs little.

    "Such conduct means that Red Bull's advertising and marketing is not just 'puffery' (吹捧) but is misleading and therefore actionable (可诉讼的) ," the suit said.

    The company said that the drink could promote healthy joints and reduce the risk of eye diseases. However, according to the organization, the product contains a lot of sugar, which could actually lead to many health problems.

    Coca-Cola agreed to pay $ 1.2 million in compensation in July. But to fully stop the company from linking the drink to health benefit, Truth in Advertising, another non-profit organization, took the issue to court again in late October.

    False advertisements have become a common problem around the world. China changed its consumer rights last year to ban advertising companies and media from making or publishing false advertisements. Celebrities are also made responsible if they endorse (代言) false or substandard products.

    July 16th was a bad day for Mr. Arthur Johnson. In the morning, he set out from his home in Santa Barbara, California. It was the start of his summer holidays and he decided to visit Wends at Las Vegas, then he hoped to go fishing in Lake Mead, 40 km from Las Vegas.

    Johnson's troubles started while he was driving happily across the Mojave Desert. His car went wrong and he tried to repair it. Then, to make matters worse, his attempts to start the car used up the battery (电池) and left it useless. After Johnson had waited an hour in the hot sun, a Canadian driver, John Williams, stopped and tried to help him. When both men failed, Williams promised to telephone a workshop to ask it to send a truck to pull the car away and repair its fuel pump.

    Johnson left the keys in his car and sat in the shade of a large tree. Soon he fell asleep. While he was sleeping, a repair truck arrived from San Pedro (the nearest town) and pulled his car away. Later on, Johnson woke up and thought that somebody had stolen his car. He started to walk back towards San Pedro but a police car stopped him to find out why he was walking in the desert.

    Johnson looked like a man wanted in Los Angels for robbery, so the police detained him at San Pedro for the night. The next day, Johnson telephoned his friends in Los Angeles. They drove to San Pedro and made the police believe that Johnson was a harmless salesman, so they set him free.

    Google's new camera, called Clips, is a small, smart device. It comes with a case that has a clip (夹子), but it's not designed to be worn on your clothing. Most interestingly, it uses artificial intelligence to take photography out of your hands so it can capture moments on its own.

    This roughly 2-inch by 2-inch camera, with a three-hour battery life and Gorilla Glass for toughness, is intended for candid moments, like when a child does something cute that may happen too quickly for you to pull out your smartphone.

    Onboard the Clips device, it uses machine learning algorithms (计算程序) to help capture scenes. Those algorithms include face recognition. "Once it learns that there's a face you see frequently, it'll try to get nice photos of those faces," said Juston Payne, the device's product manager. And they also want it to recognize facial expressions, which involved "training it to know what happiness looks like". The Google team also trained it to recognize what not to shoot—like when a child's hand is over the lens, or if it is tossed in a dark purse.

    The only way to see the images is by connecting the camera with your phone, as it has no screen for viewing or editing.

    Were people concerned it could seem strange? Yes, Payne admitted. But they said they addressed that by making it obvious what it is. A green light on the front signals that it is on. Besides, unlike a camera meant to monitor your home, it is not connected to the Internet.

    "This product is only possible because of the way that silicon has advanced" Payne said, noting that it was only in the past year or so that they could squeeze the technology down into a device this size. Going forward, we're likely to get more assistance from the artificial intelligence packed into our apps and gadgets.

    Two heads are better than one. After all, when trying to make decisions, it's good to have a second opinion. But what about a third, fourth — even twelfth? What group size is best for making decisions quickly? For ants, four to six heads surpass one and also outperform 12 or 24. That's what Sylvia Zamescu now reports.

    The 18-year-old senior at Catalina Foothills High School in Tucson, Arizona isn't generally into ants. She's interested in decision-making, especially by people. Last summer, Sylvia read that social insects such as ants and bees can be used to model decision-making. Ants, for example, forage for food. When an ant finds it, it takes a bite and heads back to the nest. On the way; the ant leaves a scented trail for other ants to pick up. Back at the nest, the ant vomits up its meal into the mouth of other ants. Those nest-mates then decide with the first ant whether the food is good enough to deserve a trip back for more. If it is, they follow the first ant's scented trail to lunch.

    When there are too few ants, it could take a long time for one ant to spread the word. If there are too many, it's hard to "tell" each about the find. What's the right number for foraging success? Sylvia decided to find out. She contacted professors at the University of Arizona in Tucson to look for someone who would let her study decision-making by ants in their lab. Professor Wulfila Gronenberg answered her email.

    Working with one of Wulfila's graduate students Sylvia set up an experiment. She tested the behavior of one, two, four, six, twelve and twenty-four ants. Each group was placed in a large box al taped "starting line". At the other end of the box were two bricks of sweetened gelatin (动物胶) one contained only 3 per cent sugar, and the other 30 per cent. Sylvia timed how long it took each group of ants to find the food. She also measured how much time they spent around each sweet treat.

    When there were just one or two ants, the discovery was slow. The same was true when she set twelve or twenty-four ants loose. But four to six ants? Perfect! These medium-size groups found the food forest. They also figured out quickly that the sweeter food was better.

    Similar work has been done on bighorn sheep, fish and fruit flies. "It may not be four to six animals, but it's the same principle," Sylvia says. A medium-size group "is optimal". So when faced with a new decision, two heads are better than one. But too many heads are too much. Like the ants, a good decision may just require a happy medium.