Be yourself and always follow your heart. Never let anyone change who you are. This is the lesson I have learned from my childhood experience when I figured out I wasn’t invited to the party, Bridget’s party.

One morning, I got off the bus and saw my friends except me hugging under the tree where we used to stand. The circle seemed tighter as I approached；the white invitation cards being hastily stuffed into backpacks gave it away. I knew as well as the entire universe that Bridget’s party was this weekend. Bridget was the most popular girl in our class. She was thin and beautiful, always wearing fabulous clothes and fine makeup.

Why hadn’t she invited me? My feet were too big? No. Maybe. My face was broken out? Why did she invite every person in my group except me? I tried to think of any interactions I’d had with Bridget recently. A few days earlier, we’d been partners during a sixth period project. I was determined to get the project done and she was absorbed in looking at fashion magazines. She barely spoke to me except to say, “You’re so serious. You know, you should smile more."

Soon, I had overheard all the details about the party. They were going swimming. It was a sleepover. They were renting scary movies and were going to stay up all night. Each time someone mentioned the party, I smiled weakly and nodded, with my stomach in knots.

When having my favorite English class, I found myself just unable to concentrate on the short stories we were supposed to be reading in class. Maybe she didn’t invite me because of my coat. It is pretty ugly compared to some of the other girls’ coats. I should have bought another color. Maybe I should smile more but I just can’t get into smiling at people unless I know them really well. But I just couldn’t pretend to be the person I wasn’t. I felt sick.

At lunch, my friend Kate who had been invited came over to me, trying to show off.

I was about to let it go when Bridget invited me as a substitute for a girl who couldn’t come.

3 . An 89-year-old man, Manfred Steiner, has reached a goal he spent 20 years working toward and nearly a lifetime thinking about: earning his Ph. D. And now he is a physicist

Steiner values this degree because it is what he always wanted and because he overcame health problems that could have affected his studies. “But I made it, and this was the most satisfactory point in my life, to finish it,” he said.

When he was young, Steiner wanted to become a physicist after reading about Albert Einstein. But his mother and uncle persuaded him that studying medicine would be a better choice. He earned his medical degree in 1955 and moved to the US soon after.

Steiner studied hematology（血液学）at Tufts University and biochemistry at the Massachusetts Institute of Technology. He became a full professor and led the hematology department at Browns’ medical school from 1985 to 1994. Steiner helped establish a research program in hematology at the University of North Carolina. He directed that program until he retired from medicine in 2000.

Steiner found medical research pleasing, but it was not quite the same as his interest in physics. “It was something like a wish that was never fulfilled, that always stuck in the back of my head,” he said. At age 70, he started taking undergraduate classes.

Physics professor Brad Marston was surprised when Steiner entered his quantum mechanics class. But he became Steiner’s adviser for his dissertation（学位论文）after realizing how serious Steiner was about the subject and how hard he worked. “He has written many papers in medical science, more papers than I’ve written in physics,” Marston said. “One thing that’s really true about Manfred is that he perseveres.”

After the university published a story about Steiner on its website, people across the US contacted him to ask for advice on how to go after their dreams later in life. His advice is: Do what you love to do.

4 . The following are four once-in-a-lifetime mountain hikes.

The Inca Trail, Peru

The Inca Trail offers a seven-day hike focusing on unique Peruvian culture. Led by our well-informed guides, you'll see some historical villages, visit an old-fashioned coffee farm, and attend a traditional offering to "Pachamama". After a long day on your feet, relax with a traditional Peruvian meal and have a night's rest in a local cottage（村舍）

The Dolomites, Italy

The On Foot Holidays' self-guided hike through the Dolomites covers the grassland of South Tyrol, the famous peaks of the Tre Cime di Lavaredo and the amazing town of Cortina d'Ampezzo. You'll climb from the Falzarego Pass, cross through to the Col dei Bos and up Mt. Lagazuoi, with its network of World War I tunnels.

Mount Kilimanjaro, Tanzania

More than 19,000 feet above sea level, Mount Kilimanjaro, an inactive volcano, is Africa's highest mountain. Climbing it is a multi-day trip through five climate zones. Duma Explorer offers several different routes（路线）up Kilimanjaro—the most popular are the seven-day Machame route, eight-day Lemosho route and a nine-day trip via the Northern Circuit. Hikes include camping equipment, meals and guides.

Chilkoot Trail, Alaska

In 1897, the Chilkoot Trail was changed from a sleepy trade route into a busy road, as part of the Gold Rush. The rush dried up within a year, but you can follow in the boomers' footsteps with Alaska Shore Hikes, through thick forest and up the Sainly Hill. Then it's a peaceful raft（木筏）ride along the Taiya River. A six-hour hike provides tourists with transportation, safety equipment and guides.

5 . Researchers at the University of Pennsylvania are working to create a special chewing gum that could help reduce the spread of COVID-19 by "trapping" the virus so a person can't transmit it to someone else.

Experts agree that vaccinations are the best way to fight against the COVID-19 pandemic, but its also known that vaccinated people can still transmit the virus. The University of Pennsylvania researchers are hoping that their chewing gum will give people a low-cost way to further prevent COVID-19 from spreading.

"This gum offers an opportunity to break down the virus in the saliva (唾液), giving us a simple way to possibly cut down on a source of disease transmission，"said Henry Daniell, a professor at the University of Pennsylvania School of Dental Medicine and leader of the research.

The gum contains plant-grown ACE2 proteins, which showed in laboratory studies to break down the SARS-CoV-2 virus. When researchers exposed saliva samples from COVID-19 patients to the chewing gum, they found the levels of viral RNA were sharply reduced to the point that the virus was almost undetectable.

The research is still in its early stages, and the researchers are working on getting permission to conduct a clinical trial in humans to determine if the gum is safe and effective. Should the gum work, Penn Today reported it could be used in situations where people need to be close to each other-such as a dental cleaning, for example-to reduce the risk of passing the virus to others.

Before researchers can bring their chewing gum to market, they have to determine how much of it should be used per day, which will be based on how long it takes the virus to reproduce. However, if it does prove to be an effective tool at fighting coronavirus, Daniell told "hundreds of millions of chewing gum" could be produced within three months.

6 . Music influences your emotions. In turn, your emotions influence your behavior. One of these is your food intake.     1     What does science say about this subject?

Researchers at the University of Arkansas studied how music influences people when they eat in a restaurant. For the study, they used four types of music: jazz, classical, rock, and hip-hop. Their results showed that people had more appetite when they listened to jazz music while they ate.     2     This has a lot to do with emotions. For instance, when you listen to music with harmonic rhythms like jazz, you feel happier. This increases your appetite.

However, another study published in Psychological Reports suggests it isn’t only increased appetite that causes people to eat more.     3     A more stimuli-filled environment makes you eat more. In fact, they tend to urge you on to eat and even “encourage” you to eat faster. On the other hand, if the atmosphere in the restaurant is relaxed, you’re likely to feel more relaxed and spend more time enjoying yourself. For this reason, you’ll tend to eat less.

Besides, the study conducted by the Journal of the Academy suggests that the volume of music can also have an effect on how you eat. More specifically, the study states that, with low-volume music, you eat better because you make healthier choices. On the other hand, the study claims that music at high volume increases stimulation and stress.     4    

For this reason, restaurants should consider the fact when thinking about the optimization of their products and services.     5     They equip themselves with the technology needed to provide memorable experiences through music, greatly strengthening their relationship with the customer.