2 . Airlines already place common-sense limits on young passengers. For example, on United Airlines, babies younger than seven days old can’t fly. And lately, there’s been a heated discussion about keeping little ones out of business class. Why draw a line there?

No one’s suggesting a ban on babies, or even kids, from flights. That wouldn’t make sense for passengers or airlines. Banning children from flights would be a financial disaster for airlines. That’s because leisure travel accounts for two-thirds of all air travel incomes, and people sometimes take their kids on vacation with them despite their kids’ screams, tantrums (发脾气) and meltdowns.

But maybe it’s time for a little course correction when it comes to children. Maybe there are places we should keep baby-free, such as a section of the plane, or the entire plane. It will benefit passengers because all or some of them will arrive at their destinations well-rested and ready for their vacation or work.

There are some passengers who believe airlines shouldn’t restrict young passengers from flying anywhere. They think people seem to forget that babies and toddlers are people. Restricting children may be an easy solution, but it will have long-term consequences. They’re not going to like the humans they grow up to be.

There’s an equally convincing argument that we should place sensible limits on babies. Some may have physiological challenges that make a flight unbearable. Others may not have the patience to sit in a pressurized aluminum tube for hours. Some of them are just not ready to sit still for a 12-hour flight. But the biggest challenge for babies and toddlers is the pressure changes on the climb to and fall from cruising (平稳行驶的) altitude.

Babies will keep flying anyway. So there are always a few ways of staying calm when you are seated close to a seat-kicking child who raises the noise level on your next flight, for example, asking a flight attendant for help, buying a good pair of noise-canceling headphones or earplugs or avoiding the babies entirely by booking the red-eye flights.

3 . “In the United States, 40 million Americans are food insecure. They don’t know where their next meal is going to come from,” said Aidan Reilly, who co-founded Farmlink. “Meanwhile, in the United States we’re throwing out over 100 billion pounds of food every year.”

Started during the hard period in spring 2020, Farmlink was initially supposed to help struggling families and food banks. Reilly and his childhood friend James Kanoff were reading and watching news about food shortages, and they learned that local farms were forced to destroy spare produce that they couldn’t sell, especially with restaurants, schools and hotels closed. Reilly, Kanoff and a group of friends worked together over Zoom, text and e-mail to contact farms. They didn’t really set out to start a nonprofit then but just thought it would be great to figure out one way to help starving (饥饿的) people.

With “we’ll come to you” as their catchphrase, the group rented trucks and attempted to do all the food pickup and deliveries themselves. They had a lot of difficulties in the beginning, but they made it work, moving more than one million pounds of produce from farms to food banks within just two months and transforming their project into a massive logistics operation in the process. Word spread, and more and more young people at home during the pandemic reached out to help.

Farmlink has worked with more than 100 farms and 300 communities in the United States, rescuing and moving enough food to distribute (配送) more than 64 million meals. “The bigger Farmlink gets, the bigger our worldview gets. There are everyday Americans who live next to us and don’t know how they’re going to feed their kids. And that’s exactly who we’re doing this for,” Reilly said.

4 . Have you ever wondered why most store-bought tomatoes are so tasteless? Does it relate to climate change or soils? The answer has something to do with farmers’ income: Tomato farmers care about output, and the genetic variants (基因变体) associated with output are not associated with tasty tomato flavor, a new study finds.

Is it possible to bring back the rich, sweet flavor of the tomato? To find out, Denise Tieman, research assistant at the University of Florida, explored which genes are associated with tomatoes’ taste.

In an attempt to fix supermarket tomatoes, Florida researchers looked at 398 different types and identified the chemical and genetic makeup of each one. They had participants taste-test 101 varieties, cross-referencing the participants’ favorites with their research findings. They ended up with 13 genetic compositions that are most likely responsible for giving tomatoes their flavor. The researchers then measured the content of the 13 flavor compositions in each of the tomatoes, and identified about250 genetic loci (遗传基因座) that controlled tomato flavor. And the researchers also wanted to explore why supermarket tomatoes have no taste.

It turns out that for industrial growers, it all comes down to priorities (优先性). North American consumers want year-round availability, so farmers started raising their plants for qualities like firmness, shelf life, high output and disease resistance, says Tieman. “Not to discount any of that because it’s all important. We want to have tomatoes in the grocery stores year round and be able to ship them long distances when it’s winter in the north. If they have to be shipped from Florida or Mexico, you need to have all those features.” But as growers planted tomatoes to meet those priorities, the flavor gradually disappeared.

Going back to the old varieties is not an option—at least, not for grocery stores. But the researchers believe that there is hope for a growable tomato that’s both long-lasting and flavorful in about three to five years.

6 . People don’t usually become homeless suddenly. It’s a chutes-and-ladders (阶梯状) process. A large new statewide study takes a closer look at the period just before homelessness, by asking a representative sample of almost 3,200 homeless people from all over the state about the dilemma they fell into, and what would have helped.

Some of the findings were unsurprising: in the state with the nation’s largest homeless population, people are unhoused because they don’t have enough money, or have experienced trauma (创伤). A quarter of all survey participants had experienced family violence, and their lives and health get much worse once homelessness strikes. But some of the report’s data run counter to popular perception: for example, most homeless people are not from out of state, contrary to the common belief that homeless people move to California for the weather and policies.

The study’s lead author, Dr. Margot Kushel, says there’s a “doom loop” of homelessness, where people have jobs that don’t cover living expenses, so they lose their homes, and the resulting instability makes it harder to keep their jobs.

Kushel points to really exciting models of homelessness prevention, where in low-income communities, they’ll have subway and bus posters saying, “Are you at risk of becoming homeless? Call us.” These programs might offer anything from cash to finding landlords or roommates. “What was really striking to us was how little money people thought it would have taken,” says Kushel. Most participants suggested that less than $500 a month, or a onetime payment of $10,000, would have kept them housed. Kushel cautions that the vast majority of mental health issues among the study participants are anxiety and depression. It’s likely that the lack of resources results in those conditions, rather than the illness causing the homelessness. “The driving issue is clearly the deep poverty,” Kushel says.

Have you ever wondered what life is like now     1     (compare) to, say, the 1980s or the 1990s? I went to ask some people I know who were adults in the ‘80s and 90s’, and the answer I got was that “Overall, life is a lot     2     (good) now!” This didn’t really surprise me. I mean, these days we’ve got mobile phones and the internet and so on — but     3    (actual) those weren’t the things they talked about.

So what did they talk about? For     4     start, we don’t have to work physically hard since now there are a lot of things like dishwashers for housework. Then there’s the matter of how, these days,     5     is possible to work at home — it’s mainly     6    (computer) that have made this possible. Not only that, there’s a lot more     7     (equal) now. It’s easier for all people, whatever their social background, gender (性别), colour and so on, to have equal access     8     a variety of career opportunities.

That said, it’s not all a matter of improvement. Quite a few people told me that they feel more stressed these days because they rely a lot on technology and they are always     9    (anxiety) about security on the internet. Plus, we spend a lot of our time     10     (use) smartphones. One person said, “Wouldn’t it be great to be off the grid (不上网) for a few days?”

9 . The next time you’re at an airport or hotel, you might notice a traveling group that consists of young kids, parents, and grandparents vacationing together.     1    But more and more families tend to bring multiple generations with them.

    2    In larger groups, for example, child-care responsibilities can be shared across family members, allowing parents to take a break. But the real value of these trips might be how they give relatives an opportunity to freshen their perception of the people they’ve known for perhaps their entire life. Travel can take us out of our familiar contexts and offer people a chance to see one another differently.

The shift toward multi-generational travel has a few explanations. For one, grandparents today stay healthy later in life, allowing them more energy for travel.     3    Plus, the average U.S. household has become more multi-generational. Americans are not just traveling with grandparents in order to spend time with them, they are traveling with them because they are more likely to live with them in the first place.     4    Americans are taking fewer vacation days than they did in the 1970s. They might want to make the most of that time by including as many people as possible.

Whatever the reason for its popularity, a multi-generational trip can be a rare time when younger and older generations can glimpse the complex people they have each become. Away from the family home, older generations get to see their adult children as responsible parents. Kids get to see their grandparents encounter a new environment.     5    

10 . The U. S. is in the midst of a “loneliness epidemic”. For a lot of people, the feeling is even more noticeable during the holidays. In addition to the emotional impact of chronic loneliness, it has some dramatic health consequences: increased risk of heart disease and stroke, infections, cancer, even death.

People may feel lonely when their social needs are not met by the people around them. Laetitia Mwilambwe-Tshilobo, a social cognitive neuroscientist at Princeton University, says loneliness epidemic captures two distinct groups: first, people with a low number of social connections; second, people who feel they have poor quality existing relationships.

Elisa Baek, a social neuroscientist at the University of Southern California, co-authored a study that looked at whether lonely people view the world differently than non-lonely people, specifically among college freshmen. Baek found that while non-lonely people were all similar in their neural responses, lonely people had responses that were really different — not just from the non-lonely group, but also from each other. Baek says that these idiosyncrasies (特性) in how lonely participants process the world, “may pose challenges in how these people are able to achieve social connection and feel connected with others.”

To study these changes to the brain, Baek’s team collected fMRI data — a measure of blood flow changes in the brain — while first-year college students watched short videos to measure how similarly participants’ brains responded to the videos. The videos ranged from dramatic and comedic clips to instructional demonstrations in order to reproduce experiences participants might have in daily life. She says it’s the closest they could get to study people’s brain activity — and how they process the world — while they were going about their lives.

Mwilambwe-Tshilobo, who is not involved in the study, says the research accurately highlights how individual differences affect people in experiencing loneliness. “Trying to connect more deeply with one or two or three other people may be more important than to try to get to know everybody and being on good terms with everybody. It doesn’t have to be someone who is like-minded. It’s more like: How can we get on the same page with people who we might not start off on the same page with, but that might form deeper connections afterwards?” she adds.