1 . Language gives us the power to describe countless actions, properties and relations that compose our experiences, real or imagined. As for how languages were created, scientists found iconicity might play a key role.

People can’t bridge language gap and understand each other without iconicity. When playing a game of charades (猜字谜) , we act out our meaning, using our hands and bodies to describe the sizes and shapes of objects. The key to this process of forming new symbols is the use of iconicity. Not limited to gesturing, iconicity appears in our visual communication too. Traffic signs, food packaging, maps. . . wherever there are people communicating, you will find iconicity.

According to our research, iconicity might also exist in our voices. We organized a contest in which we invited contestants to record a set of sounds to express different meanings. The winner of the contest was determined by how well listeners could guess the intended meanings of the sounds based on a set of written options. Critically, the sounds that contestants submitted couldn’t include actual words or onomatopoeias (拟声词) .

Listeners were remarkably good at interpreting the meanings of the sounds. Yet, all of the contestants and listeners were speakers of English. Thus, it was possible that listeners’ success relied on some cultural knowledge that they shared with the speakers. Did the listeners also understand the speakers from completely different cultural backgrounds?

Later, an Internet survey translated into 25 different languages was carried out. Participants listened to each sound from the English speakers and guessed the meaning by choosing from six written words. Guessing accuracy for the different groups ranged from 74 percent for English speakers to 34 percent for Portuguese speakers. It is far from perfect, but well above the chance rate of eight percent expected by us.

Taken together, these studies show that our capacity for iconic communication has played a critical role. Without this special talent, language would likely never have gotten off the ground.

2 . Ariel Procaccia has thought a lot about how to cut a cake over the last 15 years. As the father of three children, he knows how hard it is to divide a birthday cake to everyone’s satisfaction. But it’s also because Procaccia’s work focuses on exploring the mathematical rules for dividing stuff up fairly. One way to do that is to think abstractly about dessert.

For decades, researchers have been asking the seemingly simple question of how to cut a cake fairly. The answer reaches far beyond birthday parties. A mathematical problem at its heart, cake cutting connects strict reasoning to real-world issues of fairness, and so attracts not only mathematicians, but also social scientists, economists and more. “It’s a very elegant model in which you can distill what fairness really is, and reason about it,” Procaccia says.

The simplest approach is called the “divider-chooser” method, where one person cuts the cake into two equal pieces in his view, and the other person picks first. Each receives a piece that they feel is as valuable as the other’s. But when personal preferences are taken into account, even the easiest rule becomes complicated. Suppose Alice and Bob are to divide a cake, and Alice knows Bob prefers chocolate, she may knowingly divide the cake unequally so the smaller piece contains more chocolate. Then Bob will choose according to his preference, and Alice will get the larger piece. Both of them are satisfied with what they get, but the meaning of fairness changes in this situation.

The cake is a symbol for any divisible good. When cake-cutting principles are employed to settle disagreements, they are potentially helping the world find solutions. Procaccia has used fair division algorithms (算法) to model food distribution. Social scientist Haris Aziz is exploring situations ranging from how to divide up daily tasks to how to best schedule doctors’ shifts in hospitals.

Even after decades of investigation, cake cutting isn’t like a simple jigsaw puzzle (拼图) with a well-defined solution. Instead, over time, it has evolved into a kind of mathematical sandbox, a constructive playground that brings together abstract proofs and easy applications. The more researchers explore it, the more there is to explore.

3 . “The mountains are calling and I must go” — the famous quote is from John Muir(1838-1914), who is described as “the wilderness poet” and “the citizen of the universe.” He once jokingly referred to himself as a “poet-geologist-botanist and ornithologist (鸟类学家)-naturalist etc. etc.!” He is known as the Father of American National Parks.

Famed documentary filmmaker Ken Burns recently said, “As we got to know him… he was among the highest individuals in America; I’m talking about the level of Abraham Lincoln, Martin Luther King Jr., and Thomas Jefferson— people who have had a transformational effect on who we are.”

So where is the quote from? Well, John Muir was a productive writer. Whether he was writing poetry or simply letters to his family, John Muir was always putting pen to paper. The quote is from within one of his many letters written to his sister:

5 . Many of us remember the feeling of having our braces (牙套) regularly adjusted and retightened at the dentist’s. And interventions are based entirely upon the estimate of dentists and involve a great deal of trial and error, which can lead to too many visits to the dentist’s.

Professor Erleben and his team created a computer model that creates accurate 3D simulations (模拟) of an individual patient’s jaw, which dentists can use to predict how sets of braces should be designed to best straighten a patient’s teeth and plan the best possible treatment. To create these simulations, the computer model was used to map sets of human teeth after getting detailed CT images of teeth and the small, fine structures between the jawbone and the teeth. This type of precise digital simulation is referred to as a digital twin, a virtual model that lives in the cloud.

The virtual model can answer what’s happening in the real world, and do so instantly. For example, one can ask what would happen if you pushed on one tooth and get answers with regards to where it would move and how it would affect other teeth. The model also helps to predict the post treatment effect, achieve “visualization” of treatment, and facilitate patients to understand the plan of straightening their teeth. What’s more, it has enabled more flexible and convenient digital medical follow-up services.

The area of research that uses digital twins is relatively new. “However, we need to set up a sufficiently big database if digital twins are to really take root and benefit the healthcare industry,” Erleben said, “In the future, the virtual model can be used to plan, design and improve, and can therefore be used to operate companies, robots, factories and used much more in the energy, healthcare and other fields.”

6 . Yoga has been around for roughly 5, 000 years but it is more popular today than ever. An estimated 300 million people play yoga worldwide. Experts say its accessibility and the fact that you can practice it anywhere are big reasons why.     1    

Yoga can improve your posture and balance, strengthen bones and muscles and keep your back and joints healthy.     2     Downward-facing dog can help relieve back pain while plank (平板) pose is good for building a strong core and upper body. Typically the final position of a yoga class is ideally done for at least five minutes.     3     After that, you and your classmates usually acknowledge each other with a greeting: Namaste.

Many people adopt yoga as a form of exercise.     4     As recorded in the Yoga Sutras, a classic yoga text, the philosophy of yoga is based on the idea that the mind, body and spirit are one. The practice of yoga consists of not only physical postures but also moral guidelines, breathing techniques, and self-awareness, helping reduce anxiety and improve focus. It is an approach to health and well-being that aims to bring balance and harmony to all aspects of life.

    5     However, a 13-year U. S. study found that between 2001 and 2014, almost30, 000 individuals went to the emergency room with a yoga-related injury. Overstretching tends to be the most common issue, but serious injuries-although rare-can happen even to advanced coaches.

7 . Welcome to the hands-down Big 5 game reserve in South Africa. Volunteering in our camp in the African bush is definitely a rewarding and convenient way to help you gain a sense of devotion and satisfaction with no extra material rewards.

It’s a once-in-a-lifetime experience, where you get to give back to the natural environment and the local community. It not only is an extremely satisfying feeling when you know that you’ve helped to protect this incredible part of the world for generations to come, but enables you to gain invaluable skills and knowledge in conservation.

Priority will be given to those candidates with great patience and devotion. Rich experience for wildlife conservation as well as a certificate in wildlife protection is not necessarily important. Refusal goes to animal abusers.

Working alongside trained forest protectors, conservation staff and other volunteers from Monday to Friday (8: 30 a. m. —4: 30 p. m.), you’re expected to help with fence guards to keep animals safe from poachers (偷猎者), feed animals, and even help catch animals for medical treatment. During term-time, you may also work with the local community, delivering meals with nutrition to local children.

After work, you’ll have plenty of time to relax on the reserve. Be bathed in the sun by the reserve’s pool, play a few rounds of tennis or relax in the common room with your new friends. The program contains various overnight short-distance journeys in the surrounding areas such as Port Elizabeth, Jeffreys Bay and Grahamstown, where you can go hiking, windsurfing, whale-watching, horse-riding and much more.

9 . In the wake of the banning of white coats for doctors, Dr. Max explorers whether the rule makes sense.

White coats, replaced by plastic aprons, were banned, along with things like ties, because it was claimed that they were an infection risk, often covered with organic matter. Many doctors have felt offended by this — not because they are being required to observe rules, but because the rules make no sense.

In fact, it’s actually a dangerous policy because it mists the real problems faced when tackling hospital-acquired infections. Along with hand washing, the only other variable that has been consistently shown to be relevant to hospital-acquired infections are bed occupancy rates. Put simply, the quicker the turnaround in hospitals and the more pressure there are on beds, the more infections there are.

Rather than look critically at the current model for the NHS (National Health Service), which is all about cutting beds, and realizing that this is directly contributing to hospital infections, it’s far easier to look to the innocent white coat and ban that instead.

By banning white coats and ties, doctors now don’t look “smart” and have lost their “presence” in hospitals. Most frustratingly for doctors, who are encouraged to practice evidence-based medicine, there’s no clear evidence that white coats actually carry any disease-causing bugs. A review commissioned by the Department of Health (DH) found that most of the bugs that were found on white coats were simply from the doctor’s skin and would be on any item of clothing they wore — and didn’t cause disease anyway.

The fact that the white coats don’t spread disease is borne out not just by studies, but in practice too. In Hong Kong, for example, where white coats are still standard uniform for all doctors, the rates of hospital acquired infection are still considerably lower than UK hospitals. In fact, in other European countries where white coats are worn, the infection rates are also lower than the UK.

The case against white coats was shallow and fueled by politics not evidence. Surely, it’s time doctors rose up and put on their white coats once more.