【推荐1】Greg Bryant, a professor at the University of California, published a study in which he found that people from different cultures can identify real laughter through small changes in sound.

In the study, 884 people from 21 countries were asked to listen to random recordings of laughter.     1    , while others were made by people who were asked to laugh on command.

    2     , although their abilities vary from country to country. People of the Samoan Islands, a small island in South Pacific, were particularly good at it.     3     , according to Bryant. Because they rely heavily on emotions to create stronger social relationships.

As Professor Jessica Wolf of the University of California said in real laughter, we “produce higher sound as well as faster bursts of unclear sounds”.     4     Fake laughter is controlled by the same brain system that controls the lips and tongue. Bryant further explained this system has an imitative ability, saying with this system, you can make different noises, including crying, laughter or scream.     5    .

So the next time one of your friends laughs at something you said. Will you be able to tell if it is real or fake?

【推荐3】Researchers have discovered the first Earth-sized planet. It was first marked by scientists' using NASA's Kepler telescope(望远镜), so it's called Kepler﹣186f. It lies about 500 light years from Earth and goes around its star.The planet is the right distance from its star for water: not too close or not too far. Water is one important condition that scientists guess is necessary for life. So it could have water and possible life. It's called a true Earth cousin.

"This planet is an Earth cousin, not an Earth twin," said Barclay, who is among a team of scientists reporting on the discovery in the magazine Science this week.

"It's very exciting to find a planet similar to the Earth，"Barclay said. "It's not easy work because things change as we get more measurements."

Scientists don't know anything about the air of Kepler﹣186f, but it will be a task for future telescopes which can study for chemicals that have something to do with life.

"It's possible for life to live in this planet, but that doesn't mean there is life in it," Barclay said.

So far, scientists have found nearly 1,800 planets in the universe.

"The past year has seen a lot of progress in the search for Earthlike planets. Kepler﹣186f is very important because it is the first planet that is the same temperature and is almost the same size as Earth,"scientist David Charbonneau wrote in an email.

【推荐1】Many young people are getting creative when it comes to putting their interests into their professions.

Yi Cheng used to be an engineer at a state-owned company. In 2013, he became an owner of escape room games, where one has to find secret clues and passwords within physical spaces in order to get entry to the next room. His favorite challenge was to design different things and passwords for entry to the various secret rooms. Later he founded his own escape room company — Second World.

Now the brand has eight sites nationwide with stable income. It has attracted a large number of young consumers. During the May Day holiday break, the volume of booking for escape room games in Shanghai increased 264 percent over the preholiday level, according to Meituan Dianping, an online consumption service provider.

In recent years, those born in 1980 and 1990 have taken up 90% of the new jobs in China’s service sectors. The development of the internet economy, which refers to an economy that is based on the use of digital technologies to conduct business via the world wide web, is also broadening the ambitions and horizons of many young businessmen in China. Other groups of new professions, such as online restaurant decorators, pet photographs and owners of bed and breakfast homestays, have sprung up alongside digital transformation in China.

Internet-based platform Meituan Dianping attributed this rise to the increasing demand for personalization. Their report said, “The stereotype (刻板印象) of low education, low skills and low income that were linked to those in the service industry on the internet is being changed in new ways.”

【推荐2】What kind of amusing activities will you participate in during your life? Will you be spending your free time doing safe sports with little danger or will you always be one of the first people to try the next popular extreme activity? Scientists have been interested in finding out why some people seem to prefer dangerous activities.

Researchers have found that men often try to impress other people by proving that they are courageous and fearless, and they are more likely to take risks when people are watching them or when they are competing against other men. Research also shows that as people get older they usually behave more responsibly and avoid taking unnecessary risks. In addition, when people are in stable relationships, they seem to be less attracted to daring activities.

Some people seem to be more daring than others, but there are many different types of risks. Psychologists have identified a number of categories of risks. These include financial risks, risks related to health and safety, amusing risks and social risks. Psychologists discover that even if a person enjoys bungee(蹦极) jumping, it doesn’t mean he or she will take a chance when investing (投资) money or that he or she will tell a joke to a group of strangers.

Interestingly, research shows that in most cases men are less cautious than women, but women take more social risks than men. They are more likely to make career changes as they get older and to express unpopular opinions in business meetings.

Yet, at the end of the day, the probability of particular people taking a risk depends on their personalities. In general, optimistic people are more likely to take risks because they focus on the possible positive outcomes of their actions. On the other hand, those with opposite personality are much more likely to avoid taking a chance.