Humans have launched themselves into the outer space. They've landed on the moon. They've built habitable space stations that orbit the Earth. The next giant leap for mankind is to reach another planet – specifically, Mars.

    The problem is that it's no easy task. The planet is 586 times further away from the Earth than the moon, and it'll take around 180 to 220 days to reach Mars, depending on where each planet is in its orbit. Such long periods in space have suggested many potential health problems, including hormonal changes, skin conditions, and muscle and bone deterioration (损耗).

    Here's where some furry friends come in. A wide range of animals have been in space, from fruit flies and spiders to cats, and dogs. Such experiments began as far back as the late 1940s in first tests to see if living things could withstand the extreme g-force (重力) of a rocket launch.

    Mice continue to play a very important part in space experiments, mainly because the animals make excellent test subjects. They're small, which makes them inexpensive and easy to care for. In addition, their size and short life span make it possible to do the equivalent of several human years of tests in a much shorter time. Finally, because mice are mammals, they share many common characteristics with humans in terms of genetics, biology and behavior.

    Astromice have hit the headlines recently, as a team of scientists led by Betty Nusgens, professor of biology at the University of Liege in Belgium, found that the mice suffered a 15 percent thinning of their skin after 91 days aboard the International Space Station (ISS).

    This experiment was part of a wider NASA mission (任务) called the Mice Drawer System (MDS). The Italian Space Agency developed the facility, which allows six mice to be housed, monitored, and automatically fed and watered aboard the ISS, among which three survived during the mission.

    The mice have participated in 20 separate experiments, to study such effects as osteoporosis (骨质疏松症), anemia (贫血) and heart health.

    Results for the 20 experiments are coming in gradually. But it's clear that mice continue to play an important role in the ongoing quest to conquer the final frontier.

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    A continuation to the 2015 hit Wolf Warrior opened across the Chinese mainland on July 27 and gained 1.7 billion yuan ($253 million) in five days,making it the highest-grossing movie in July.The popular review portal Douban.com gives it 7.5 points out of 10 thanks to its action sequences.

    The film,which features Wu Jing in multiple roles besides director and star,is set in an unnamed African country facing a civil war.It was a real-life adventure in Africa for him.At a recent event in Beijing,he speaks of his experiences while working on the military-themed movie Wolf Warrior 2.He saw colleagues bitten by spiders,acted with lions and nearly drowned at sea.

    Wu plays Leng Feng,a former Chinese special forces operative,who fights a US mercenary（雇佣兵）and his bloodthirsty soldiers.The cast includes Hong Kong actress Celina Jade and US action star Frank Grillo,who is known for his role as Crossbones in Captain America movies.

    For Wu,the movie is a dream project.The former martial arts champion shot to fame with kung fu productions, such as the 1999 TV series,Legend of Dagger Lee.Wu,who was then seen as a successor to the legacy of China's action superstars like Jackie Chan,Jet Li and Donnie Yen,wanted to go beyond just fighting on screen.So,after co-directing the 2008 thriller Legendary Assassin with Hong Kong filmmaker Li Chung-chi,Wu began working on the Wolf Warrior idea.He was inspired by reports about Chinese peacekeeping missions and efforts to evacuate Chinese who were caught up in war-torn areas overseas.He made Wolf Warrior 2 to showcase the kindness,wit, courage and sacrifice of Chinese soldiers.

    The crew also went to Iceland to film some scenes,a possible indicator of what will come next.

    Chester is one of the best cities in the UK. As soon as you arrive in Chester you will appreciate the city's unique atmosphere and sense his history. Founded by the Romans over 2,000 years ago, much of the Roman influence remains and Chester's city walls are the most complete in Britain. Combined with history and heritage (遗产), Chester is a lively city full of bars, pubs, clubs, hotels, and restaurants for you to discover, attracting you to visit again and again.

    Travelling to Chester: Chester is easily accessible by many means of transport—whether you are travelling by rail, car, bus or plane. Please check our route planner below to help you plan your journey to Chester. Once you arrive in the city there are numerous car parks; however, during rush hours the easiest way to travel is by bus.

    Hotel: From bed & breakfast to the luxury of Chester's only five star hotel, Chester has all covered. Whether your trip is for business or pleasure, your room is just a click away!

    Sightseeing and Tours: The best way to see Chester is by a guided tour. If you join one, you still have a variety to choose from. Whether you choose the traditional guided walk, to be guided around Chester historical landmarks by bus or to take a boat down the River Dee, you will sure enjoy the delights of Chester.

    Babies made from three people approved in UK

Babies made from two women and one man have been approved by the UK's fertility regulator. The historic and controversial move is to prevent children being born with deadly genetic diseases.

    Doctors in Newcastle - who developed the advanced form of In Vitro Fertilization or IVF (人工授精) - are expected to be the first to offer the procedure and have already appealed for donor eggs. The first such child could be born, at the earliest, by the end of 2017.

    Some families have lost multiple children to incurable mitochondrial (线粒体的) diseases, which can leave people with insufficient energy to keep their heart beating.

The diseases are passed down from only the mother so a technique using a donor egg as well as the mother's egg and father's sperm has been developed.

    The resulting child has a tiny amount of their DNA from the donor, but the procedure is legal and reviews say it is ethical (伦理的) and scientifically ready.

    "It is a decision of historic importance," said Sally Cheshire, chairwoman of the Human Fertilisation and Embryology Authority (HFEA)."I'm sure patients will be really pleased by what we've decided today."

    But some scientists have questioned the ethics of the technique, saying it could open the door to genetically-modified(转基因) 'designer' babies.

    The HFEA must approve every clinic and every patient before the procedure can take place. Three-person babies have been allowed only in cases where the risk of a child developing mitochondrial disease is very high.

    Prof Mary Herbert, from the Newcastle Fertility Centre, said: "It is enormously pleasing that our many years of research in this area can finally be applied to help families affected by these devastating diseases.

    "Now that that we are moving forward towards clinical treatments, we will also need donors to donate eggs for use in treatment to prevent affected women transmitting disease to their children."

    Prof Sir Doug Turnbull, the director of the Wellcome Centre for Mitochondrial Research at Newcastle University, said: "We are delighted by today's decision. We will also provide long-term follow up of any children born."

    NHS England has agreed to fund the treatment costs of the first trial of three-person IVF for those women who meet the HFEA criteria, as long as they agree to long-term follow up of their children after they are born.

    A picture speaks a thousand words. And with over a thousand emoji pictures to represent our words, who needs to speak or write any more? According to Professor Vyv Evans of Bangor University, emoji is the UK's fastest-growing language in history. These little electronic pictures started life in Japanese mobile phones in the 1990s and are now hugely popular. They have inspired fashion, like the real-life dress copied from the dancing lady emoji, and are even recognized as art! In New York's Museum of Modern Art you can now see the first set of the 176 original emojis.

    Why do we love them so much? They allow us to personalize text and have fun as we express ourselves, make people laugh and be creative in how we use them. UK teenagers also told us they really appreciated the fact that emojis are quick and easy.

    People have their favourite emojis. In the UK, the most used emojis are ' face with tears ofjoy', ' face blowing a kiss' and 'Iove heart'. Maybe (with emojis at least) the British are more fun and romantic than people think! Companies such as McDonalds have also tried to use people's love of emojis to make advertisement. They used a series of emojis to tell a story of a disappointing day given a happy ending by a visit to McDonalds. Unluckily for McDonalds, most people added the vomiting(呕吐) emoji to the blank space after the story.

    What is the future of emoji? Is emoji developing so rapidly that it will soon compete with English as a global language? Or is technology changing so fast that emoji will soon be forgotten when the next big thing comes along? It is hard to say and even technology and language experts are divided on the subject.

    What do you think? Keep your eyes open for new developments!

Foldable phones are once again facing questions about their durability(耐久性).The Galaxy Z Flip and the Motorola Razr are now both available to buy in the US-but early reports suggest the screens are easily damaged.

One media published photos of two layers of the Razr's display separating, affecting the touch screen. The Galaxy flip, meanwhile, boasts(自夸)a "flexible glass" display—but tests appear to show it scratching(刮擦)as easily as plastic.

In a statement, Samsung said the display had a protective layer, and had undergone extensive testing. "While the display does bend, it should be handled with care, "it said.

The Z Flip's "pretty thin glass" is one of Samsung's primary marketing messages for the new phone. But a durability test conducted by popular Zack Nelson, a regular buyer, suggested it was no more durable than soft plastic screen, and could even be dented(痕)by fingernail.

Nelson said Samsung's screen scratched exactly how plastic screen would react. "I don't know what material this is, but Samsung definitely shouldn't be calling it glass," he said. He found that the screen of the Motorola Razr scratched as easily but it is not marketed as "glass".

The Motorola Razr was put on sale 13 days ago in the US, but Raymond Wong, an editor says the flexible screen on his handset has already broken. The upper layer of the Razr's screen separated from the bottom, creating "a giant horizontal air bubble" for no apparent reason. He wrote that the fault appeared after 45-minute train ride during which the phone was in his pocket. The screen was completely warped from hinge-to-hinge with the top layer raised like a poorly applied screen protector. But Mr. Wong said that apart from the visual problem, the damage has affected the responsiveness of the touchscreen.