We know that hugs make us feel cosy inside. And this feeling could actually ward off stress and protect the  immune (免疫) system,  according to a new research from Carnegie Mellon University.

    It's a well-known fact that stress can weaken the immune system. In this study, the researchers sought to determine whether hugs could protect individuals from the increased sensitivity to illness brought on by the particular stress that comes with interpersonal conflict.

    “We know that people experiencing ongoing conflicts with others are less able to fight off cold viruses. We also know that people who report having social support are partly protected from the effects of stress on psychological states, such as depression and anxiety, ” the study's lead author, psychologist Dr. Sheldon Cohen , said in a statement. “We have tested whether awareness of social support is equally effective in protecting us from sensitivity to infection caused by stress and also whether receiving hugs might partially account for those feelings of support and thus protect a person against infection.”

    In the experiment, over 400 healthy adults filled out a questionnaire about their perceived (感知到的) social support and also participated in a nightly phone interview for two weeks. They were asked about the frequency that they engaged in interpersonal conflict and received hugs that day.

    Then, the researchers exposed the participants to a common cold virus, and monitored them to assess signs of infection. They found that both perceived social support and more frequent hugs reduced the risk of infection associated with experiencing interpersonal conflict. Regardless of whether or not they experienced social conflicts, infected participants with greater perceived social support and more frequent hugs had less severe illness symptoms.

    “This suggests that being hugged by a trusted person may act as an effective means of conveying support and that increasing the frequency of hugs might be an effective means of reducing the effects of stress,” Cohen said. “The apparent protective effect of hugs may result from the physical contact itself or hugging being a behavioral indicator of support and closeness. Either way, those who receive more hugs are somewhat more protected from infection.”

    If you need any more reason to wrap your arms around someone special, consider this: hugs also lower blood pressure, reduce fears, improve heart health and decrease feelings of loneliness.

Skydive Greene County

    Come out and let us teach you how to skydive today! We are located in Xenia, Ohio and is within a reasonable driving distance of major cities in Ohio. Situated on a private airport, Skydive Greene County offers world-class training. We didn't start skydiving but we are Ohio's oldest skydiving school which opened in 1961!

◆Tandem Skydiving

    Tandem skydiving is required if this is your first time skydiving. After filling out paperwork and watching a short video, you will be ready to make your skydive. Somewhere around 11,500 feet you will be secured to your tandem instructor. The door will open and you exit the plane.

    Your freefall with your instructor will last for approximately 40-50 seconds. We can almost guarantee this will be the most exciting minute of your life as you reach the speed of around 120 mph, falling for about two miles back to the earth!

    Don't forget to have a video taken of your skydive to show all those that didn't think you would jump from an airplane!

◆Static Line Courses

    Once you have made your tandem skydiving, you can move on to our Static Line Program. The Static Line Jump is the traditional way to learn to skydive. We have classes throughout the year. Every student will be led through the entire day by a licensed instructor. Never does the student feel unattended.

    Once training is over, students will make their first jump on that very same day! If the weather does not cooperate, you can come back the next day, or we will re-schedule a time to make your skydive.

●Price

$165.00 Tandem skydiving only

$175.00 Static Line Course only

Invite one of our professional videographers on your skydive:

$125.00 DVD with photos

●Booking

    To book your tandem skydive or skydiving course, call us at (937) 372-0700. We just ask for a call if you cannot keep your scheduled appointment. And you must be at least 18 years old to make a skydive at SGC.

    Come to learn with the best and make a skydive today! For further information, please call us at (937) 372-0700 or visit our website www. greenecounty.com!

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Life-Changing Science Discoveries

    Here's a look at some discoveries that have changed the world. It's impossible to rank their importance, so they're listed in the order they were discovered

Micro-organism

    Before French chemist Louis Pasteur began experimenting with bacteria in the 1860s, people did not know what caused disease. He not only discovered that disease came from micro-organisms, but also realized that bacteria could be killed by heat and disinfectant(消毒剂). This idea caused doctors to wash their hands and disinfect their instruments, which has saved millions of lives.

Penicillin

    Antibiotics are powerful drugs that kill dangerous bacteria in our bodies that make us sick. In 1928, British Alexander Fleming discovered the first antibiotic, penicillin, which he grew in his lab. Without antibiotics, infections like strep throat could be deadly

DNA

    On February 28, 1853, James Watson of the United States and Francis Crick of England made one of the greatest scientific discoveries in history. The two scientists found the structure of DNA. Our genes are made of DNA and determine how things like what color hair and eye we'll have. In 1962, they were awarded the Nobel Prize for this work . The discovery has helped doctors understand diseases and may someday prevent some illnesses like heart disease and cancer.

X-rays

    Wilhelm Roentgen, a German physicist, discovered X-rays in 1895. X-rays go right through some substances, like flesh and wood, but are stopped by others, such as bones and lead. This allows them to be used to see broken bones or explosives inside suitcases, which makes them useful for doctors and security officers. For this discovery, Roentgen was awarded the first-ever Nobel Prize in Physics in 1901.

    We were silently waiting on the platform in the late afternoon. There he was, my 80-year-old grandfather with his silvery hair. And there I was, a teenage girl in my jeans and T-shirt. His aged but still clear blue eyes were taking in the scene as I wondered how I was going to get through the next two days. Why did I ever agree to accompany my cranky grandpa on a train ride from New York to Georgia?

    No one else wanted to be the fellow traveler since my grandfather refused to fly. In contrast, I loved to fly since I wanted to get to the destination as quickly as possible. No matter what anyone told my grandfather about the comfort and safety of flying, he refused to book a flight, saying, "It's not just the trip; it's the adventure of getting there."

    With my first step onto the train, the journey was already different from what I expected. The train was modem and filled with friendly travelers. We settled into the club car, where we could enjoy food and drinks while watching the scenery pass. Instead of listening to my music, I became a willing audience and learned family history that I had never had the time or patience to learn. With teary eyes, he told me that going to family events was hard for him since my grandmother died. It always made him think about those who were no longer with us. For the first time I felt I understood him. I gained a new appreciation for our time together.

    In this fast-paced world, we often miss important moments. There is great significance in listening to elders who offer a piece of their history and experience. I may be more open to opportunities to stay with my grandpa. Life isn't just about the destination; it's about the journey.

    Assistant Professor of Chemistry

    The University of Chicago: Physical Sciences Division: Department of Chemistry

    Location

    Chicago, Illinois

    Description

    The Department of Chemistry at The University of Chicago invites applications for the position of Assistant Professor of Chemistry in all areas of chemistry.

    Applicants must apply online at apply.interfolio.com/66199 and upload a cover letter, a curriculum vitae with a list of publications, a brief outline of research plans and a one－page teaching statement. In your cover letter, please specify(注明) one sub－discipline that best represents your research interests (inorganic, materials, organic, physical, theoretical or chemical biology). In addition, three reference letters are required.

    Qualifications

    At the time of hire the successful candidate must have completed all requirements for a PhD in Chemistry or a related field. Joint appointments with other departments are possible.

    Application Instructions

    Review of applications will begin on October 7, 2020 and will continue until all positions are filled.

    Apply to: apply.interfolio.com/66199

    Equal Employment Opportunity Statement

    The University of Chicago is an Affirmative Action/Equal Opportunity/Disabled/Veterans Employer and does not discriminate on the basis of race, colour, religion, sex, sexual orientation, gender identity, national or ethnic origin, age, status as an individual with a disability, protected veteran status, genetic information, or other protected classes under the law. For additional information please see the University's Notice of Nondiscrimination.

    Job seekers in need of a reasonable accommodation to complete the application process should call 7737021032 or e-mail equalopportunity@uchicago.edu with their request.

There was an encounter that later sparked scientists' investigations into using jellyfish as a greater source of food, as well as a potential ingredient in medicines and nutraceuticals. In the summer of 2013, while Stefano Piraino was wandering along the rocky shoreline, he noticed a washed-up jellyfish. Then, he tore off a piece and put it in his mouth. It was salty, crunchy and crispy from the sun. "It was very tasty, " remembers Piraino, a zoologist. After a few days of lying on the shore, their stinging cells(刺细胞)are deactivated, Piraino explains. Still, he warns that people should not eat jellyfish straight out of the sea, because raw jellyfish contains bacteria that can cause food poisoning. 

Recently, there have been numerous reports of jellyfish blooms—seasonal events where there is a large and sudden increase in jellyfish numbers. These population explosions break the balance of ocean ecosystems, and have the potential to harm biodiversity and reduce fish stocks. 

Some scientists, such as Piraino, believe one solution is broadening our palates(口味)since the world is in urgent need of sustainable food resources. Jellyfish can be integrated into traditional recipes and local cuisine. Not only are they high in protein, but the microalgae inside the cells of some jellyfish are rich in fatty acids. In fact, jellyfish is already eaten across Asia. In China, jellyfish has been eaten for more than 1, 000 years, with jellyfish salad a popular delicacy. 

Jonathan Houghton, a senior lecturer in marine biology, believes that jellyfish can be a better source of collagen(胶原蛋白). There are a number of companies already using jellyfish as a substitute(替代品) for cow and pig collagen, which is often used in medical treatments for humans. One British company says collagen from jellyfish offers a better choice, because their collagen can work with a wide variety of human cell types.