1 . The joy of giving is real, according to a study. Research presented in the Journal of the Association for Psychological Science shows that those who give gifts are happier — and happier for longer — than those who receive gifts.

Researchers conducted two studies last year. In one，participants were given $5 every day for five days and were required to spend the money on the same thing each day. Some participants were required to spend the money on themselves, while others were required to give to make a donation to charity. In a second experiment that was done online, participants played 10 rounds of a word puzzle game and each won 5 cents per round, which they could keep or donate.

In both experiments, participants reported their overall happiness. Those who donated their money showed that their happiness declined at a much slower rate than those who kept the money or spent it on themselves.

The researchers note that when people focus on an outcome, they can easily compare outcomes, which may diminish their sensitivity to each experience. When people focus on an action, they may focus less on comparison and instead experience each act of giving as a unique happiness-inducing event. Further analyses ruled out some potential alternative explanations, such as the possibility that participants who gave to others had to think longer and harder about what to give, which could promote higher happiness.

The results are especially interesting because according to one of the researchers, Ed O’Brien of the University of Chicago Booth School of Business, they conflict with past research. “If you want to sustain happiness over time, past research tells us that we need to take a break from what were currently consuming and experience something new. Our research reveals that the kind of thing may matter more than assumed: Repeated giving, even in identical ways to identical other，may continue to feel relatively fresh and relatively pleasurable the more we do it,” O’Brien said.

So for all the holiday gifts you give this season, expect to feel happy and know that feeling is going to stick around for a while.

4 . Researchers at the DogStudies lab at the Max Planck Institute for the Science of Human History have shown that dogs may possess some metacognitive (元认知) abilities. Specifically, when they do not have enough information to solve a problem, they will actively look for more information, similarly to primates (灵长类).

In a recent study, project leader Julia Belger explored whether dogs have metacognitive abilities. To test this, the researchers designed a device involving two V-shaped fences. A reward, either food or a toy, would be placed by one researcher behind one of the two fences while another researcher held the dogs. In some cases, the dogs could see where the reward was placed, while in others, the dogs could not. The researchers then analyzed how frequently the dogs looked through the gap in the fence before choosing an option.

The researchers found that the dogs did check significantly more often for the reward when they had not seen where it was placed. These results show that dogs do tend to actively seek extra information when they have not seen where the reward is concealed.

The results did not allow the researchers to say definitively whether dogs possess meta-cognition, though they displayed some evidence for it. Julia said, “For humans, vision is an important information gathering sense. In this case, our experiment was based on a checking action relying on sight, but the dogs probably also used their sense of smell when checking through the gap. We know that smell is very important to dogs and we could see that they were using it.”

Julia added, “In future, we would like to develop an experiment to investigate under what circumstances dogs decide to use their sense of smell versus sight. This may give us additional insights into their information seeking abilities.”

5 . Have you ever loved a destination but couldn’t figure out why — or even a way ——to express your feelings? That’s my dilemma with Morocco.

In August, I traveled in a country that had long been, on my wish list. I rode a camel, got lost in Medinas, and ate more couscous (粗麦粉) than was humanly possible.

I loved the trip. Our friendly guide introduced us to the helpful locals. I made friends with my tour mates and my roommate (which, on a tour, is a huge blessing). I loved being lost in the smell of different spices, and the chaos of millions of people and the dark red of the Sahara were all I wanted them to be.

There were many moments when I felt like a fish out of water and things didn’t go my way. But I take pleasure in those moments because it’s when you are pushed out of your comfort zone that you grow. Morocco lived up to all my expectations, but for some reason, my experience has been hard to express. Why?

One constant in my travels is that of a touchstone, one defining point where the trip all comes together and acts as a prism (三棱镜) for everything the journey represented . In Costa Rica，it was getting lost in a jungle. In Thailand, it was meeting those five people who changed my life.

I’m so inconsistent about Morocco because I lack that touchstone. There’s no “whoa” moment. But I have thousands of little ones - staring at a million stars in the blackness of the desert, discovering new foods with some amazing Australians on my tour, and befriending the fish sellers.

6 . Technology use seems to be the new wave of addiction hitting people of all ages. Its extreme use can be compared to the use of drugs, which is called Plug-in Heroin.

The next time you’re in a crowded public place, look at the people around you. It’s hard to find someone who isn’t glued to the tiny screen, fingers moving at lightning speeds, texting their friends, e-mailing coworkers or listening to music. It may seem ridiculous that someone is that addicted to such a small object. I’ve seen people who seem to be at their wits’ end if their phone or iPad has been taken away, lost or left at home.

Some people may ask, “What’s wrong with technology use? It’s a way for people to communicate.” While this is true, the overuse of technology isn’t always appropriate in certain settings. Schools are becoming stricter about the use of cell phones, iPods and other electronics in classrooms. Various workplaces have signs hanging on their walls warning employees that “Cell phone use is not permitted” or “Cell phones are forbidden”. On the first warning you will be sent home, and on the second warning you will be fired.

Electronics may be a way for people to communicate and stay in touch with each other, but the disadvantages may outweigh the benefits. People are losing the ability to hold face-to-face conversations with others. However, it’s hard to avoid electronics in this day and age because almost everything is turning into an electronic format. Books, originally meant for paper design, are now being transferred to electronic forms. Photo albums, and even yearbooks, can now be viewed via the Internet. With this growing trend, future generations are bound to become even more addicted to technology.

Is there a cure for electronic addiction? Simply turning electronics off for an hour or two a day may help to an extent, but it will not completely rid electronic addiction. There only seems to be one cure left, and it may be the hardest: self control.

9 . Is your doctor telling you the truth? Possibly not, according to a new survey in Health Affairs of nearly 1,900 doctors around the country.

The researchers found that 55% of the doctors said that in the last year they had been more positive about a patient s prognosis (预断) than his medical history. And 10% said they had told their patients something that wasn’t true. About a third of the doctors said they did not completely agree that they should disclose medical errors to their patients, and 40% said they didn’t feel the need to disclose financial ties to drug companies.

Really? The study’s lead author, Dr. Lisa Iezzoni, a medicine professor at Harvard Medical School and director of the Mongan Institute for Health Policy at Massachusetts General Hospital, was surprised to learn how dishonest her colleagues were. “Some of the numbers were larger than I expected they might be,” she says.

Why the white lies? In some cases, Iezzoni says it was for self-protection. Nearly 20% of the doctors admitted that they didn’t disclose a medical error to their patients because they were afraid of being punished for improper treatment. In other cases, it may have been for the patient’ s benefit. Some might spare an anxious patient from hearing about the slightly abnormal results of a lab test, for example, if it has no negative effect on the patient’s health.

“After all doctors are human too,” says Iezzoni. “They don’t want to upset their patients, they don’ t want their patients to look unhappy or burst into tears. But they also need to be professionals; so they need to tell themselves that if there is a difficult truth they need to tell their patients, they need to work out a way of communicating that effectively.”

That’s important for doctors to appreciate, because as well-intentioned as their lies may be, other studies consistently show that patients prefer the truth, and would rather hear unpleasant news than remain ignorant about an awful medical condition. Being fully informed is a way that patients can prepare for whatever might occur. Therefore, it is necessary for doctors to learn to express themselves.

10 . Chances are that you’ve seen a movie or played a video game that contains a cyborg（半人半机器的生物）. These half-man-half-machine beings have been a vision of many creative writers. But it seems that some people can’t wait for the future to arrive.

At the Body Hacking Conference in 2017, held in Texas, US, hundreds of science fiction fans from all over the world gathered to show off their body hacks. Rob Spence, 45, had his right eye removed after an accident. Soon after, he decided he wanted to replace it with something more interesting. The minute I learned that I was losing my eye, I began researching how I could turn it into a camera, he told Wired.

This is an extreme example, and body hacking doesn’t always take things so far. For example, around the world, many people are choosing to get NFC chips implanted in their hands. This is the same technology as used in smartphones, and it allows users to pay for things or even unlock their cars just by using their fingertips. The chip is the same size as a grain of rice and can be fixed and removed easily without much pain.

Hannes Sjoblad, founder of a Swedish body hacking group, believes that these implants are just the natural next step for smart technology that is already in wide use, such as smartwatches.

We are updating our bodies with technology on a large scale already with wearables. But all of the wearables we wear today will be implantable in 5 to 10 years, he told Business Insider.

Sjoblad believes that such implants will become a regular part of our lives. Indeed, his group was asked to put chips in the hands of employees at a company in Sweden, allowing them to do things like opening doors, paying for lunch, and using the copy machine in the office.

Who wants to carry a clumsy smartphone or smartwatch when people can have it in the finger-nail? he said.