1 . We smile because we are happy, and we frown because we are sad. Recent studies suggest that our emotions are driven by their related facial expressions.

This February psychologists at the University of Cardiff in Wales found that people whose ability to frown is lessened by botox injections (肉毒杆菌注射) are happier, on average, than people who can frown. The researchers administered an anxiety and depression questionnaire to 25 females, half of whom had received botox injections to stop frowning. The botox injected people reported feeling happier and less anxious in general.

In a related study from March, scientists at the Technical University of Munich found that the botox subjects had much lower activity in the brain circuits (回路) involved in emotional processing and responses — in the amygdala, hypothalamus and other parts of the brain — as compared with controls who had not received treatment.

The concept works the opposite way, too. People who frown during an unpleasant procedure report feeling more pain than those who do not, according to a study published in May 2008 in the Journal of Pain. Researchers applied heat to the forearms of 29 participants, who were asked to either make unhappy, neutral or relaxed faces during the procedure. Those who exhibited negative expressions reported being in more pain than the other two groups.

No one yet knows why our facial expressions influence our emotions as they seem to. The associations in our mind between how we feel and how we react may be so strong that our expressions simply end up strengthen our emotions — there may be no evolutionary reason for the connection.

3 . Robots in the art world are nothing new. In fact, for centuries, people have built robots as art objects. However, what’s different now is that artists and engineers are building robots that actually create art.

In 1973, British-born painter Harold Cohen wrote a computer program and called it AARON. At first, AARON only made simple outlines whose color and details Cohen would later add. Fifty years later, AARON is able to paint anything a human could paint. So can AARON be called an artist or creative? In 2010, Cohen explained, “Although he wrote the initial computer code that AARON follows, AARON can generate unlimited numbers of images.” So according to Cohen, the simple answer is yes-AARON is creative.

It’s not just paintings that robots are creating, though. Last year, a robot called Shimon released is first album (唱片) on Spotify. Shimon began life as a simple robot marimba (木琴) player. Over the years, however, it’s learned how to perform with other musicians, write original songs. Shimon does this by analyzing huge amounts of music—roughly 50,000 rock, jazz and hip-hop songs-to identify patterns and then uses that information to create original works.

It may be cool to hear a song created by a robot, but is there any other reason to build robots that can play music? According to Gil Weinberg, one of Shimon’s creators, because the robot is capable of doing things that a real musician might not think of, he and his team “hope and believe that these new abilities would lead to new directions that could not be achieved in human-to-human cooperation.”

While questions about robots creating art are fun to think about, there are many other ways that robots can help artists in the way they create their works. For example, advancements in 3D-printing technology will allow artists to build more complex pieces for their sculptures. Therefore, robots in the art world are here to stay.

4 . When people think of a typical mineral mine, it’s probably underground. It’s unlikely that the picture of plants and soft greenery would cross their minds. Now, new explorations into phytomining (植物采矿) may change that viewpoint. Instead of traditionally mining metals from rocks, phytomining uses plants as an alternative source for them. Using plants to extract metals can have significant environmental benefits over rock mining.

Phytomining was first studied in 1983, but it hasn’t yet been adopted by the metals industry. In 2004, Indonesian soil scientist Tjoa took her research to Sorowako, a small town in Indonesia with one of the largest nickel (镍) mining areas, to look into plants that continued to live after years of mining. She brought samples back to her lab and found that these super plants were more than just surviving — they were growing.

The plants were absorbing and storing nickel from the soil. Large amounts of metals kill most plants, but these, known as hyper-accumulators (超富集植物), were learning to adapt. If these plants were storing metal, that meant science could find a way to extract the minerals for use and quite frankly, scientists easily did. When the shoots are harvested and burned, the metals are separated from the plant material in the ashes.

Tjoa returned to Sorowako and spent years searching for new hyper-accumulator species. After a plant is considered a possibility, there’s a simple test paper that turns pink when placed against the leaf of a hyper-accumulator plant. Two local Indonesian plants were found but there are many others still to be discovered.

Tjoa’s research caught the attention of Bijasksana, a professor of rock magnetism. Together they designed an experiment to understand magnetic susceptibility (磁化率) when plants accumulate more nickel. Their research led to the discovery of two new species of hyper-accumulators. Besides, this research serves as the basis for the potential that plants can give to the mining industry, offering great advantages to our ecosystem and toward building a more sustainable future.

5 . A world in which extinct creatures could be brought back to life came a step closer yesterday. Australian scientists have managed to extract a gene from a preserved sample of a Tasmanian tiger and make it active. The breakthrough has left them dreaming that one day they will be able to recreate the animal, which died out more than 70 years ago. And if it can be done with the Tasmanian tiger, it may also be possible to resurrect(复活) creatures that have been extinct for far longer.

“There used to be a time when extinction meant forever, but no more,” said Professor Mike Archer. “We are now able to seriously challenge whether those animals that have gone have gone for ever. What has been achieved is a very important step in bringing back those animals that are extinct. And while I think that technically it is still pretty difficult at the moment, we can now see the possibilities. I’m personally convinced that the Tasmanian tiger will be brought back to life in my lifetime.”

The breakthrough came after nine years of experiments by scientists at the University of Melbourne, who extracted a gene from one of several tigers preserved in alcohol in a Melbourne museum. They removed the equivalent gene from a mouse embryo (胚胎), implanted the tiger gene and then watched as the mouse continued to grow normally, suggesting the tiger gene had been activated.

Team leader Dr. Andrew Pask said it was the first time DNA from an extinct species had been used to” induce (引起) a functional response in another living organism”.

However, the animal’s entire gene structure would have to be revived in the same way to even begin the possibility of bringing the Tasmanian tiger back from the dead. Mick Mooney, a wildlife officer of the Tasmanian Government, was worried that such developments could encourage people’s indifference to the protection of endangered species.

“If people think that we can bring animals back to life after they’ve gone, they will start saying that there is nothing to worry about because we can fix it up later.”

7 . If you are a party animal in Guangxi, join us to explore some of the popular festivals in Liuzhou.

Temple Fair Day

It is believed to be the oldest and the largest temple fair day celebrated in Fengshan, Liuzhou. It is an event known to easily attract more than 30,000 people to take part in the parades. It is a day for enjoying temple wishes, dancing to non-stop ethnic songs, and tasting lots of local dishes.

Time: February       Price: Free

March 3rd Festival

This is an annual event that takes place every March in Sanjiang county. The festival features a lot of ethnic minority homemade food. You can also expect to enjoy live ethnic music and dances performed by famous local dancers.

Time: March 3rd       Price: 3 RMB

Liuzhou Marathon Festival

This event started more than 10 years ago. Currently, it is an attractive weekend that sees attendance go way past 12,000 people. During the festival, participants take part in exciting activities, with the major ones like funny marathon, and food sales.

Time: April            Price: 12 RMB

Dragon Boat Show

Longtan park is usually the place of Dragon Boat Show—a festival for boating lovers that occurs in May. It is the largest dragon boat show in Liuzhou. A great deal of people will be there at that time. Welcome to join the show.

Time: May            Price: 5 RMB