2 . It was a sunny afternoon in June of 2022 when 20-year-old Anthony Perry stepped off the train at Chicago’s 69th Street station. On the platform, two men were fighting bitterly. Then the unthinkable happened: the pair fell over the edge and onto the tracks. One man ended up on his back. Suddenly, he started convulsing (抽搐) unnaturally. He had fallen on the third rail, the conduit (导线管) for the 600 volts of electricity that powers Chicago’s L trains. The aggressor leaped backward, bounded back up onto the platform and disappeared.

Perry couldn’t just stand there and watch. He sat at the edge of the platform and eased himself down. He took a few quick bounds and approached the victim. The guy looked dead, his body still moving violently as the electricity pulsed (搏动). Gathering up his courage, Perry reached down and grasped the victim’s wrist. Instantly, he felt a blast of electric shock shoot through his body. Perry shrank and jumped back. He reached down a second time, and was shocked again. But the third time he seized the man’s wrist and forearm and, braving the shock, pulled with all his strength. The guy’s body slid briefly along the third rail, coming to rest on the gravel on the outer edge of the tracks.

The man was breathing, but irregularly. Something wasn’t right. “Give him chest compressions (按压)!” yelled a woman. Perry was no expert, but for a few moments he worked on the man’s heart until the victim began convulsing. Then he heard a sudden noise behind him — medical workers and firefighters had arrived. Perry let the professionals take over. His heart still racing from the electric shocks, he climbed back up onto the platform, grabbed his things and headed home.

The evening news reported the incident. After a friend outed him to the media, Perry became the toast of Chicago. Perry was then recruited by the Chicago Fire Department and is now training to be an emergency medical technician.

3 . That dinosaurs ate the mammals (哺乳动物) that ran beneath their feet is not in doubt. Now an extraordinary fossil newly described in Scientific Reports, unearthed by a team led by Gang Han at Hainan Vocational University of Science and Technology in China, shows that sometimes the tables were turned.

The fossil -dated to about 125 million years ago, during the Cretaceous period-was formed when a flow of boiling volcanic mud swallowed two animals seemingly locked in a life-and-death fight. The one on top is a mammal. This animal is a herbivorous species closely related to the Triceratops (三角恐龙). Animal interactions such as this are exceptionally cam e in the fossil record.

One possibility is that the mammal was eating something already dead, other than hunting live prey. These days it is uncommon for small mammals to attack much larger animals. But it is not unheard of. And Dr. Han and his colleagues point out that those mammals which eat dead bodies typically leave tooth marks all over the bones of the animals. The dinosaur’s remains show no such marks. There is also a chance the fossil could be a fake. More and more convincing fake s have emerged, as this one did -though Dr. Han and his colleagues argue that the complexly connected nature of the skeletons (骨骼) makes that unlikely, too.

Assuming it is genuine, the discovery serves as a reminder that not all dinosaurs were enormous during the Cretaceous and not all mammals were tiny. From nose to tail, the dinosaur is just 1.2 meters long. The mammal is a bit under half a meter in length. Despite being half the size, the mammal has one paw firmly wrapped around one of its prey’s limbs, and another pulling on its jaw. It is biting down on the dinosaur’s chest, and has ripped off two of its ribs. Before they were interrupted, it seems that the mammal was winning.

6 . A new study suggests that mindfulness education — lessons on techniques to calm the mind and body — can reduce the negative effects of stress and increase students’ ability to stay engaged, helping them stay on track academically and avoid behavior problems.

After finding that students who self-reported mindful habits performed better on tests and had higher grades, researchers from the Center for Education Policy Research at Harvard University wanted to know if school-based mindfulness training could help more students reap similar benefits.

They designed a study focusing on sixth-graders in a Boston school. The study showed that sixth-graders who participated in an eight-week mindfulness were less stressed out than their classmates who hadn’t. Practicing mindfulness had helped improve the ability to focus in the moment, expanding students’ capacity to learn and regulate their emotions.

Four times a week, instructors from Calmer Choice, a Massachusetts nonprofit specializing in mindfulness education, taught the group techniques and led them through practices, like focusing on a rock for a minute, then discussing when their mind wandered and refocused on the rock. Another group of sixth-graders took computer coding during that time instead. The students were randomly assigned between the groups.

At the end of the eight weeks, the mindfulness group reported being less stressed than they had been before the mindfulness education, and better able to practice self-control. And their amygdalae, the part of the brain that controls emotion, responded less to pictures of fearful faces than they did prior to the mindfulness work, suggesting their brains were less sensitive to negative stimuli, or, in other words, that they were less likely to get stressed out and lose focus. The group who attended coding classes didn’t see the same benefits.

The findings suggest that the mindfulness instruction helped boost students’ attention skills, as well as develop coping mechanisms for stress. The researchers believe it could be especially useful for schools to support students suffering from severe mental damage and other adversities that trigger stress in the body, hurting students’ ability to succeed.

7 . Whether we are sitting down or standing up, still or moving, body posture influences our mood. Several studies have shown this link between physical posture and mood. Others have shown a relationship between our mood and our cognitive (认知的) performance, including memory, reasoning, learning, and the speed of reaction and processing of information.

So a logical question arises. Can body posture influence our cognitive performance?

Previously, a New Zealand team (University of Auckland) carried out an experiment on posture when we walk, especially in the street. The team had found a very clear influence of our posture on our mood and confidence. It appears that walking with a hunched back, bowed head and motionless arms have a negative influence on our mental state.

Indeed, the researchers found that the simple act of straightening up, standing up straight, with your head held high, and gazing forward gives us a serious boost of confidence. Not only does our spontaneous posture have a psychological effect, but by correcting it, it is possible to bring about improvement in the long term.

In this other study, this time carried out by an Austrian team (Friedrich Alexander University in Erlangen-Nuremberg), researchers observed the same phenomenon, this time in a sitting position. Young adults were invited to participate in tests presented as intended to assess their ability to concentrate. In fact, the researchers had them sit in different postures — from upright to very slumped (消沉) — in order to note their influences on mood and cognition.

A first observation indicates that “sitting upright” is associated with a better overall mood. It is also found to have a positive influence on the speed of processing information and completing tasks, although the test pass rate does not vary significantly with posture.

Finally, and surprisingly enough, blood pressure is a little more favorable in an upright position. To further complete the list of benefits of sitting upright, we will add that it is widely recommended for protecting the back in case of work that requires sitting for a long time.

9 . A growing body of research suggests that the gut microbiome (消化道菌群) could play a major role in a rising chronic disease that makes us physically weaker. The illness, which is commonly called chronic fatigue syndrome (CFS), is characterized by intense fatigue, gastrointestinal (胃肠道的) issues, muscle pain, and cognitive challenges such as headaches and difficulty concentrating, among other symptoms. It often follows a viral infection which can lead to a “disruption” in a balanced gut ecosystem. Actually, an increasing number of Americans have been the sufferers since the outbreak of COVID-19.

Two recent studies published in Cell Host &Microbe point to changes in the microbiome as a possible cause of CFS. Research groups at Columbia University and the Jackson Laboratory performed detailed analyses of the microbes in stool (粪便) samples from patients with CFS and compared them to healthy controls.

The two groups found similar bacteria species were less present in CFS patients compared to control patients. They focused on bacteria that produce butyrate, a fatty acid involved in regulating metabolism and the immune system. “Butyrate plays several roles in directing the body’s response to infections, while also protecting the barrier between the intestine (肠) and the circulatory system, regulating genetic changes in cells, and more,” says Brent Williams, lead author on the Columbia study. Williams and his colleagues extensively analyzed the role of butyrate in CFS patients’ guts, even identifying a correlation between low levels of bacteria that produce this acid and more severe symptoms.

Parallel findings from the Jackson Laboratory team suggest the bacteria that produce butyrate could be used to diagnose CFS. Previous research has identified microbiome issues in CFS patients, but the new findings help clarify which microbes could be related to the illness.

More research on butyrate-producing bacteria and other species identified in the studies is necessary to investigate these potential biomarkers of CFS, the authors say. If the findings are replicated, specific gut bacteria could be used to diagnose the illness, which is currently identified based on symptoms alone.

The findings additionally point toward possible treatments, such as probiotics or microbiome-focused diet adjustments—though patients who have been sick for long periods may require drugs that alleviate the damage done to their metabolism or immune system.

10 . Getting to know your money personality can help you rein in your spending habits and take back control of your personal finances. Here, finance saving money expert Pete Ridley at CarFinanceSaver reveals the UKs core money personalities, along with actions to adopt that reduce the negative consequences of each personality type.

The Spontaneous Spender

A spontaneous spender refers to a person that exhibits a “spend now, think later” attitude. They can find it tricky to differentiate between “need to haves” and “nice to haves”, and often feel “spender’s guilt”.

“Before you make a purchase, take time to decide whether the item is a ‘need to have’ or a ‘nice to have’. This will aid in avoiding splurges (挥霍) that provide short term satisfaction and post-spenders’ guilt.” says Ridley.

The Determined Saver

An underlying sense of worry and fear can be at the root of a persistent saver, and their determination to save disguises an overwhelming fear of money.

“Saving is great,” says Ridley, “but it’s important to regard money as a friend and not an enemy. Always be sure to make non-essential purchases. These items don’t have to be a major expense, but just enough that you acknowledge that money can be there to be enjoyed and not just put away.”

The Money=Status

This personality type can live beyond their means by making purchases that they don’t need, striving to keep up with others and saying yes to friendship plans that they cannot afford, to keep up the appearance of financial wellbeing.

“It’s here that you can adopt the 50/20/30 rule: 50 percent essential living expenses, 30 percent disposable income and 20 percent saving and paying debts,” suggests Ridley.

This will maintain financial wellbeing while helping to acknowledge that money doesn’t necessarily equal status or even impress those around you.