In her new book, “The Smartest Kids in the World,” Amanda Ripley, an investigative journalist, tells the story of Tom, a high-school student from Gettysburg, Pennsylvania, who decides to spend his senior year in Warsaw, Poland. Poland is a surprising educational success story: in the past decade, the country raised students' test scores from significantly below average to well above it. Polish kids have now outscored(超过……分数) American kids in math and science, even though Poland spends, on average, less than half as much per student as the United States does. One of the most striking differences between the high school Tom attended in Gettysburg and the one he ends up at in Warsaw is that the latter has no football team, or, for that matter, teams of any kind.

    That American high schools waste more time and money on sports than on math is an old complaint. This is not a matter of how any given student who plays sports does in school, but of the culture and its priorities. This December, when the latest Program for International Student Assessment (PISA) results are announced, it's safe to predict that American high-school students will once again display their limited skills in math and reading, outscored not just by students in Poland but also by students in places like South Korea, Belgium, the Netherlands, Finland, Singapore, and Japan. Meanwhile, they will have played some very exciting football games, which will have been breathlessly written up in their hometown papers.

    Why does this situation continue? Well, for one thing, kids like it. And for another, according to Ripley, parents seem to like the arrangement, too. She describes a tour she took of a school in Washington D.C., which costs thirty thousand dollars a year. The tour leader—a mother with three children in the school—was asked about the school's flaws(瑕疵). When she said that the math program was weak, none of the parents taking the tour reacted. When she said that the football program was weak, the parents suddenly became concerned. “Really?” one of them asked worriedly, “What do you mean?”

    One of the ironies(讽刺) of the situation is that sports reveal what is possible. American kids' performance on the field shows just how well they can do when expectations are high. It's too bad that their test scores show the same thing.

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    A new report from the International Bar Association (IBA) suggests machines will mostly likely replace humans in a growing number of occupations. One of the authors of the report, Gerlind Wisskirchen, believes that governments need to introduce human quotas（配额）in some sectors in order to protect jobs.

    The report suggests that the jobs at risk are common ones, such as accountants and lawyers. Financial services are more at risk than legal roles though, as algorithms（计算机程序）are easier for a computer to solve when compared to keeping client relationships and making new laws. Simple physical work is also in the firing line, the authors mention.

    As the world population heads toward 7 to 10 billion, futurist Morris Miselowski says, “I am not sure that this nine-to-five, Monday to Friday work as we understand it, will continue for many of us for the next couple of decades.” He forecasts that the biggest changes will be a shift（转变）away from the traditional work time..

“Artificial intelligence (AI)（人工智能）… and all sorts of new technologies are just about to happen; all of that's going to change where, how and when we do work.”

Ms Wissfikirchen was surprised by how far-reaching the effects of automation（自动化）are.

     “Even though automation began 30 years ago in the blue-collar sector, the new development of artificial intelligence and robotics affects not just the blue-collar sector, but the white-collar sector,” said Ms Wisskirchen.

    Toby Walsh, professor of Artificial Intelligence at UNSW, said there was a ray of hope when it came to technology and the future of jobs.

“It's always good to remember that although technology will take jobs away as they raise in this report, there will also be new jobs created by technology,” he said. “In fact if we look at the history of technology since the Industrial Revolution, more jobs have been created than destroyed.”

    A team of engineers at Harvard University in trying to create the first robotic fly. Designed to do what a fly does naturally, the tiny is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    "The added difficulty with a project like this is that actually none of its components is off the shelf and so we have to develop them all on our own' said Robert Wood, a Harvard engineering professor.

    They engineered a series of systems to start and drive the robotic fly. "The seemingly simple system which just moves the wings has a number of interdependencies (相互依赖）on the individual components, each of which individually has to perform well, but then has to be matched well to everything it d connected to," said Wood.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. "Basically it should be able to take off, land and fly around," he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications." You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animal, but using these robots instead" he said. "So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day-to-day basis."

    Although toys packaging says it's educational, it doesn't make it so. That's the finding from a new study in JAMA Pediatrics that found some toys being marketed as language promoters got in the way of learning.

    Research shows that for kids to understand, speak and eventually read or write a language, they need to hear it - lots of it. And it's never too early for parents and to caregivers to get talking. That explains the booming industry in talking electronic toys that claim to help kids learn language.

    Professor Anna Sosa, of Northern Arizona University, led the study and says she gave families three different kinds of toys to play with: books, traditional toys like humble blocks and a shape sorter, and electronic toys. Sosa says she picked those toys because they are advertised in their packaging as language-promoters for babies between the ages of 10 and 16 months.

    "We had a talking on farm-animal names and things," Sosa says of the electronic toys. "We had a baby cell phone. And we had a baby laptop. So you open the cover and start pushing buttons, and it tells you things. The parent-child couples were asked to play separately with each type of toy over the course of three days."

    "When there's something else that's doing some talking, the parents seem to be sitting on the sidelines and letting the toy talk for them and respond for them," Sosa says. "That's bad because the best way a toy can promote language in infants and toddlers is by stimulating interaction between parent and child. There's simply no evidence that a young child can learn language directly from a toy. It isn't responsive enough. It isn't social."

    As for the other toys, traditional blocks and puzzles stimulated more conversation than the electronic toys, and books outscored them all. But don't underestimate the humble block. While traditional toys fell short of books in interaction quantity, Sosa notes, they kept pace in terms of quality.

Three Japanese tourists taking a holiday in Australia got stuck when their GPS told them they could drive from the mainland to an island, failing to mention the 15 kilometres of water and mud in between.

As they drove their hired car from Moreton Bay to nearby North Stradbroke Island, they started to notice the firm surface they were driving on giving way to the well­known bay mud. However, being confident that their GPS would direct them to a road soon, they decided to drive on, managing to travel around 500 metres before their car was up to its tires in mud. To make matters worse, the tide (潮汐) started to come in and soon forced them to seek help and abandon the vehicle. Just four hours later the car was trapped in two metres of water—to the great amusement of onlookers on the shore and passengers on passing boats and ferries.

Yuzu Noda, 21, said she was listening to the GPS and "it told us we could drive down there. It kept saying it would navigate (导航) US to a road. But we got stuck… there's lots of mud". She and her travel companions Tomonari Saeki, 22, and Keita Osada, 21, instead had to give up their plans for a day trip to the island and headed back to the Gold Coast of a lift from the RACQ tow truck (吊车) driver who was called to the trapped car. No such luck for the hired car, though—after assessing the situation, no attempt was made to recover it. The students from Tokyo, who are due to return home tomorrow, said the experience would not put them off returning to Australia for another visit. Mr Tomonari said, "It has rained every day on our six day holiday. Hopefully next time we come back it will be sunny. "

The car was covered by insurance, but the tourists will have to pay up to about $1,500 in extra charges.

Some people often wonder whether they are fighting a battle with their genes to maintain a healthy weight. In fact, researchers have provided plenty of evidence that people are born with tendencies to be lighter or heavier. For example, studies of identical twins have revealed great similarity in their overall weight. Part of this similarity may be explained by the finding that some people are born to burn a lot of calories just through ordinary day-to-day activities while others are not. Those who are not are more at risk for weight gain.

Researchers have discovered some of the actual genetic mechanisms (机制) that may make some individuals more likely to be obese. For example, a gene has been found that appears to control signals to the brain that enough fat has been stored in the body in the course of a meal—so the individual should stop eating. The gene influences the production of leptin (瘦蛋白), which keeps appetite under control. If leptin doesn't work well, it is likely that individuals will continue to eat. Thus the gene that controls leptin appears to have a critical influence on the potential for obesity.

The confirmation that leptin plays a role in weight control has encouraged researchers to identify and understand other weight-related genes. Recent attention has focused on a gene called GAD2. GAD2 helps control the amount of the neurotransmitter (神经递质) GABA. In general, when more GABA is available, appetite is increased. For that reason, people who have a form of GAD2 that allows more GABA to be available may be at risk for overeating. You can see that GAD2 is not directly an obesity gene. Rather it has an indirect influence on obesity through its direct influence on GABA.

Genetic research holds out the promise of innovative solutions to obesity. Researchers hope that an understanding of the link between genus and weight control will enable them to provide new drug treatments. Nonetheless, even the most optimistic researchers provide a warning: "Innovative drugs will be effective only when they are used along with lifestyle changes."