【推荐1】Raising a litter of teething wolf pups (幼崽) is not easy, but the wolves living in Yellowstone National Park are parenting experts. This spring, the park’s biologists shot a video of adult wolves repeatedly returning to their den (窝) with so-called “toys”—in the form of bones and sticks—to keep their little ones happy between meals.

Once they stop eating their mother’s milk, pups rely on adults to go out, hunt, and then bring back food to the den. But when that’s not possible, the adults instead retrieve odd items for the wolf pups to play with.

“Pups wait for food deliveries from successful hunts, but in the absence of food, adults bring ‘toys’,” the park wrote on Facebook. “The behavior of bringing items back to the den may be enhanced from generation to generation and probably helps keep adults from being surrounded by sharp puppy teeth.”

The adult wolves are part of “Mollie’s Pack”, one of ten known wolf packs living within Yellowstone as of January 2023. This particular pack is named after Mollie Beattie, who in 1993 became the first woman to serve as director of the United States Fish and Wildlife Service.

Beattie, who died in 1996, advocated for the reintroduction of wolves into Yellowstone National Park to help rebalance the ecosystem after the animals were systematically killed within the park Wolf reintroduction was a highly controversial initiative that many people opposed. And yet, Beattie and other wildlife managers ultimately achieved their vision and successfully relocated 41 wolves from western Canada to the park between 1995 and 1997. Today, that number has blossomed to at least 108 wolves living in Yellowstone.

Today, gray wolves are protected under the Endangered Species Act in many states. In late 2020, the administration removed the animals from the endangered list. But in February 2022, they were re-listed as endangered after a judge reversed the decision.

【推荐1】Scientists found statistical equality between boys ‘and girls’ brains when it comes to learning math. Jessica Cantlon, author of the study and professor of developmental neuroscience(神经科学) at Carnegie Mellon University, told NPR that when it comes to learning math, boys and girls are “indistinguishable.”

Boys and girls experience learning math in the same way, the new study found, debunking the age-old thought that-males are superior to females in the subject.

The study published Friday in the journal Science of Learning discovered that young boys and girls use the same networks in the brain to solve math problems. “While some have thought that boys are biologically likely to be better in math, there was little evidence to support those claims, “researchers said in the study. Some earlier studies have shown gender differences, but “it is impossible to separate intrinsic(本质的), biological differences from sociocultural influences.”

For the study published Friday, researchers analyzed 104 kids between 3 and 10years old while they performed some tests connected with mental processes of understanding and watched videos of math lessons in an MRI scanner. In a first for such a study, scientists used neuroimaging(神经成像) to capture images of kids ‘brains to evaluate the differences between males and females.

Testing revealed that girls’ and boys’ brains function similarly during mathematical processing. “Additionally, there was no evidence of gender differences in neural responses to mathematics content, neural responses during educational video viewing, or rates of neural development for mathematical processing in early childhood.”

Furthermore, scientists “found statistical equality between boys and girls throughout the brain. “This led the researchers to conclude that “gender differences in the field of science in adults don’t develop from intrinsic differences in children’s brains but likely from a complex environmental origin.”

【推荐3】You fight or argue, and then you make up and share secrets-these are just some of the usual scenarios you are quite familiar with if you have a sister. It’s true that growing up with a sister can be annoying.     1    . A study conducted in 2010 at Brigham Young University has discovered that having a sister can greatly improve a child’s mental and emotional health. Here are some benefits of having a sister in your life.

    2    . A sister can help you avoid loneliness and fear because she can keep you company. A sister can also reduce your feelings of being unloved-she shows her care and consideration to you. More delightfully, the age gap between you and your sister doesn’t affect the results.

It helps to shape your character.     3    , such as generosity, selflessness and empathy (同情心). When you have a sister, you tend to share, help her selflessly and show your consideration since she is one of the closest persons in your life. These qualities are essential for you throughout your life.

It offers you opportunities to learn how to self-regulate (自我调节). Getting in fights with your sister can help in learning how to regulate or control emotions. Laura Padilla Walker, head of the study, said, “If siblings (兄弟姐妹) get in a fight, they have to regulate emotions.     4    ”

It enables you to communicate more and better. In a separate study conducted in the University of Ulster, it’s revealed that having a sister can help siblings communicate more.     5    . A sister can help them understand and communicate with other females better, too.

【推荐1】Last weekend I made a journey from New York to London, with my daughter to see my mother. To my relief, the travel was far easier than I expected: the airports were empty, the plane was half-full and the airline staff kindly provided food and wine, which I drank greedily with a straw while wearing the required face mask. What I did not expect was to be hit with a culture shock on arrival in London.

In New York, face masks are now an inseparable part of life. Street signs declare “OUTSIDE WITH NO MASK? FORGET ABOUT IT!” Buildings carry more polite notices warning that anyone without a mask is banned. And even without them, almost everyone I see on the streets in my corner of Manhattan has their face covered. Strangers sometimes shout angrily at people who do not.

Indeed, there is such a strong sense of social pressure that in recent months I have worn a mask even when cycling alone, along Manhattan’s East river. And my daughter has taken to shopping online for “fashion masks”.

But not so in London. A new report issued by the Royal Society and the British Academy shows that, at the end of April, just 25 percent of Brits wore face masks in public places compared with 66 percent of Americans. We saw this for ourselves: in London, we appeared to be almost the only people wearing masks on the streets or in shops; even on public transport some seem to reject them.

Simon Roberts explains powerfully in a timely new book the Power of not Thinking. Habits matter deeply, but we rarely notice them — unless we travel. After a few days in London, I have started to “forget” my mask when I go outside. When I return to New York, I will have to relearn my habits all over again.

【推荐2】Eating too much fat contributes to the risk of stroke (中风) and other heart diseases. However, it’s the type of fat, not the amount, that appears to be more important when it comes to stroke. Eating plant-based fats lowers stroke risk, according to a study presentation given at the American Heart Association Scientific Sessions 2021.

The study, which hasn’t yet been proved by other researchers, found people who ate the most vegetable-based fats were 12% less likely to experience a stroke compared to those who ate the least. On the other hand, people who ate the highest levels of animal-based saturated (饱和) fat were 16% more likely to experience a stroke than those who ate the least fat of that kind. The findings show the type of fat and different food sources of fat are more important than the total amount of fat in preventing certain diseases including stroke.

“You need fat to survive. Fats help your body absorb vitamins from foods, build cells, give you energy and keep you warm. But it’s the unsaturated fats that come from vegetables, nuts and fatty fish that can lower your cholesterol (胆固醇) level and help keep you healthy. Saturated fats are generally not as healthy They mainly come from red and processed meats.

“A proper reduction in red and processed meat consumption within a healthy eating pattern can reduce total death by 13%, heart disease death by 14%, cancer death by 11% and type 2 diabetes risk by 24%,” said Dr. Frank Hu, one of the authors of the stroke study.

Interestingly, dairy fat was not associated with a higher risk of stroke, the study found. There has been an ongoing debate among researchers as to the role of dairy. The diet guidelines for Americans call for three servings of low-and no-fat dairy each day.