【推荐1】With the young unable to afford to leave home and the old at risk of isolation(孤独), more families are choosing to live together.

The doorway to peace and quiet, for Nick Bright at least, leads straight to his mother-in-law: she lives on the ground floor, while he lives upstairs with his wife and their two daughters.

Four years ago they all moved into a three-storey Victorian house in Bristol — one of a growing number of multigenerational families in the UK living together under the same roof. They share a front door and a washing machine, but Rita Whitehead has her own kitchen, bathroom, bedroom and living room on the ground floor.

“We floated the idea to my mum of sharing a house,” says Kathryn Whitehead. Rita cuts in: “We spoke more with Nick because I think it’s a big thing for Nick to live with his mother-in-law.”

And what does Nick think? “From my standpoint, it all seems to work very well. Would I recommend it? Yes, I think I would.”

【推荐3】French children 15 and under will no longer be allowed to bring smart devices to school. Lawmakers in France voted recently to ban all phones, tablets, and other Internet-connected devices from school grounds. The ban will start in September, “These days, the children don’t play at break time anymore,” Jean-Michel Blanquer, France’s education minister, said. “They are just all in front of their smartphones, and from an educational point of view, that’s a problem. Some strict measures must be taken immediately.” A 2010 law bad already banned smartphones during “all teaching activity” in France. But the new rules say smartphones and tablets are not allowed even during breaks. Students who bring these digital devices to school have to keep them in their backpacks and turned off, If they want to call their parents, schools will help. However, the new law doesn’t forbid students to turn to them during extra-curricular activities. It also makes an exception for disabled students.

Alexis Corbiere is a French politician. He said the effort to make such a law should have been put to something else because teachers have already carried out this rule so far. “I don’t know a single teacher in this country that allows the use of phones in class and in school, ” he told French news channel BFMTV.

How about smartphones in American schools?According to a study by the National Center for Education Statistics, about 66% of public schools banned devices in 2019, which was down from 91% in 2009. Why the change? Liz Kolb, a professor at the University of Michigan School of Education, said that parents are concerned about security in schools. “In the rare case that something may occur, ” she said, “the belief by some parents is that a cell phone could be a useful tool for safety.”

【推荐1】Steven Stein likes to follow garbage trucks. His strange habit makes sense when you consider that he’s an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road. What is even more interesting is that one of Stein’s jobs is defending an industry behind the plastic shopping bags.

Americans use more than 100 billion thin film plastic bags every year. So many end up in tree branches or along highways that a growing number of cities do not allow them at checkouts(收银台). The bags are prohibited in some 90 cities in California, including Los Angeles. Eyeing these headwinds, plastic-bag makers are hiring scientists like Stein to make the case that their products are not as bad for the planet as most people assume.

Among the bag makers’ argument: many cities with bans still allow shoppers to purchase paper bags, which are easily recycled but require more energy to produce and transport. And while plastic bags may be ugly to look at, they represent a small percentage of all garbage on the ground today.

The industry has also taken aim at the product that has appeared as its replacement: reusable shopping bags. The stronger a reusable bag is, the longer its life and the more plastic-bag use it cancels out. However, longer-lasting reusable bags often require more energy to make. One study found that a cotton bag must be used at least 131 times to be better for the planet than plastic.

Environmentalists don’t dispute(质疑) these points. They hope paper bags will be banned someday too and want shoppers to use the same reusable bags for years.

【推荐2】“What would the world be if there were no hunger?” It’s a question that Professor Crystal would ask her students. They found it hard to answer, she wrote later, because imagining something that isn’t part of real life—and learning how to make it real—is a rare skill. It is taught to artists and engineers, but much less often to scientists. Crystal set out to change that, and helped to create a global movement. The result—an approach known as systems thinking—is now seen as essential in meeting global challenges.

Systems thinking is crucial to achieving targets such as zero hunger and better nutrition because it requires considering the way in which food is produced, processed, delivered and consumed, and looking at how those things intersect (交叉 ) with human health, the environment, economics and society. According to systems thinking, changing the food system—or any other network—requires three things to happen. First, researchers need to identify all the players in that system; second, they must work out how they relate to each other; and third, they need to understand and quantify the impact of those relationships on each other and on those outside the system.

Take nutrition. In the latest UN report on global food security, the number of undernourished (营养不良 )people in the world has been rising, despite great advances in nutrition science. Tracking of 150 biochemicals in food has been important in revealing the relationships between calories, sugar, fat and the occurrence of common diseases. But using machine learning and artificial intelligence, some scientists propose that human diets consist of at least 26,000 biochemicals—and that the vast majority are not known. This shows that we have some way to travel before achieving the first objective of systems thinking - which,in this example, is to identify more constituent parts of the nutrition system.

A systems approach to creating change is also built on the assumption that everyone in the system has equal power. But as some researchers find, the food system is not an equal one. A good way to redress (修正 ) such power imbalance is for more universities to do what Crystal did and teach students how to think using a systems approach.

More researchers, policymakers and representatives from the food industry must learn to look beyond their direct lines of responsibility and adopt a systems approach. Crystal knew that visions alone don’t produce results, but concluded that “we’ll never produce results that we can’t envision”.

【推荐3】In 1812, the year Charles Dickens was born, there were 66 novels published in Britain. People had been writing novels for a century — most experts date the first novel to Robinson Crusoe in 1719 — but nobody wanted to do it professionally. The steam-powered printing press was still in its early stages; the literacy (识字) rate in England was under 50%. Many works of fiction appeared without the names of the authors, often with something like “By a lady.” Novels, for the most part, were looked upon as silly, immoral, or just plain bad.

In 1870, when Dickens died, the world mourned him as its first professional writer and publisher, famous and beloved, who had led an explosion in both the publication of novels and their readership and whose characters — from Oliver Twist to Tiny Tim — were held up as moral touchstones. Today Dickens’ greatness is unchallenged. Removing him from the pantheon (名人堂) of English literature would make about as much sense as the Louvre selling off the Mona Lisa.

How did Dickens get to the top? For all the feelings readers attach to stories, literature is a numbers game, and the test of time is extremely difficult to pass. Some 60,000 novels were published during the Victorian age, from 1837 to 1901; today a casual reader might be able to name a half-dozen of them. It’s partly true that Dickens’ style of writing attracted audiences

from all walks of life. It’s partly that his writings rode a wave of social, political and scientific progress. But it’s also that he rewrote the culture of literature and put himself at the center. No one will ever know what mix of talent, ambition, energy and luck made Dickens such a singular writer. But as the 200th anniversary of his birth approaches, it is possible — and important for our own culture — to understand how he made himself a lasting one.

【推荐2】Steve Sparks was a young successful lawyer working for a famous law firm when his 3-year-old daughter’s serious leg problem changed his focus and the direction of his life. The problem led to many visits to doctors and an uncertain future. In a moment his life’s focus shifted from where he was going to take his clients to lunch to whether his daughter Katie was ever going to see her fourth birthday.

For three years Katie received many treatments in the hospital. And with the help of wonderful doctors and kind care-givers in Nemours Foundation, who Steve and his wife Michelle describe as heroes, Katie’s illness was cured.

Forever changed by the experience and inspired by the heroes who saved his daughter’s life, Steve felt he couldn’t go back to business as usual. He felt there was something else he was meant to do. He joined the Nemours Foundation as their lawyer. The job change came with a 65% pay cut from what he was making, but Steve’s purpose had found him and it was more important than a paycheck.

Fast forward 18 years, Katie is now a healthy 20-year-old junior in college and Steve is the Senior Vice-president of the Nemours Foundation where he brings Kati story and his purpose to work every day.

In 3 weeks, Steve will celebrate Katie’s 21^st birthday, and give a big thank-you to Nemours by riding his bicycle from Nemours’ headquarters in Jacksonville, Florida to Wilmington, Delaware. He will ride more than 900 miles in 9 days and raise 100,000 for the Nemours Foundation. His purpose hasn’t just become a part of his work. It has become a part of himself and his family.

【推荐3】Older women who walk a little over three kilometers each day might live longer than less active women of the same age, a new study suggests.

Many Americans hoping to stay healthy set a daily goal of 10, 000 steps, or about eight kilometers. They often have this goal because they are wearing electronic devices which set that target, note researchers in the United States. Their findings appeared recently in the publication JAMA Internal Medicine.

But it is not clear how much intensity(强度)or speed matter when counting the health benefits of every step, the researchers write. They add that 10,000 steps per day might not be the right goal for everyone.

For the study, researchers observed 17,000 women, all in their early 70s. They asked the women to wear accelerometers for at least four days. Accelerometers are small devices that measure the number of steps and the intensity of movement. The researchers followed up with the women much later, around 4. 3 years later, on average. Since the beginning of the study, 504 women had died. Compared to women who took no more than 2, 718 steps daily, the women who took at least 4,363 steps per day were 41 percent less likely to die.

“Even a modest amount of steps is associated with lower death rates, ” said I-Min Lee, the lead writer of a report on the study. “The rate of stepping did not matter in these older women: it was the number of steps that mattered.”

The study had a few limitations. For example, the researchers only measured women’s movements once, at the start of the study period. It is possible that the women’s behaviors changed over time. Still, the results are “good news for older adults who may have difficulty walking at faster paces, ”said Keith Diaz, a researcher at Columbia University. He was not involved in the study.

“Any walking is better than nothing, ” Diaz said by email. “With even small amounts of walking, your risk of death will be sharply reduced. For those who have difficulty walking, other research shows that any form of aerobic activity provides health benefits,” he added. “Swimming, bicycling or any form of activity that is continuous in nature will provide health benefits.”