One half of the brain remains on high alert during the first night of sleep in a new space.

    Over the course of three experiments on 35 young, healthy volunteers, researchers measured brain activity during two nights of sleep. They found that part of the left side of the brain remained more active than the right side only on the first night, specifically during a deep sleep stage.

    “When you sleep in a new place for the first time, a part of one side of the brain seems to stay awake, so you could wake up faster if necessary,” said senior study author Yuka Sasaki of Brown University.

    While this may be bad news for business travelers who regularly make brief overnight trips, it may not be as troublesome for people who go away for longer periods of time, Sasaki added by email.

    To see how being in a strange place affects sleep, Sasaki and colleagues performed a series of lab tests on their subjects.

    When they stimulated（刺激） the left side of the brain with sounds in the right ear during deep sleep on the first night, that led to greater possibility of waking and faster action upon waking, than if sounds were played in the left ear to affect the right side of the brain. On the second night, there wasn't any difference in reactions to tests between the left and right sides of the brain, even during deep sleep. This suggests that there is a first-night-only effect specifically in one side of the brain during deep sleep, the authors conclude.

    One limitation of the new study is its focus on healthy volunteers, which means the results may not apply to people with sleep disorders, the authors note.

    While it's possible that the findings may explain poor sleep among frequent travelers, the study wasn't designed to test whether these “first night effects” continue to happen to people every time they hit the road, said Patrick Finan, a researcher at Johns Hopkins University School of Medicine in Baltimore.

    If you need to prove who you are in China, you will usually need to use an ID card. It shows your name, date of birth, address, nationality, photo and ID number. {#blank#}1{#/blank#}

    On April 17, Alipay introduces its first electronic ID card. The card is an electronic version of real ID card and is recognized by Ministry of Public Security. {#blank#}2{#/blank#} Users can simply select "Web ID" in the app and follow the instructions.

    The electronic ID card can now be used in Hangzhou, Suzhou and Fuzhou. People in these three cities can use the card to check into hotels, buy train tickets and do other tasks {#blank#}3{#/blank#}

    About 4 million people will be able to use the service within the next year. "{#blank#}4{#/blank#}Even if they forget their ID cards, they can still get things done. Since the process is simplified, it also makes things easier for government offices and companies," Tang Feifan, mayor of Suzhou, told Zhangjie online.

It's safe to use Alipay's new service, in case you are worried that someone might steal your identity. {#blank#}5{#/blank#}Then, you have to pass both a fingerprint and facial recognition scan before you can use the electronic ID card.

A. This gives people another choice.

B. The safety of the electronic ID card is the main concern.

C. They don't have to show their standard ID card anymore.

D. But not all people have welcomed the electronic ID card.

E. But now, you can prove your identity using your smartphone.

F. It's quite easy to get an electronic ID card by using the Alipay app.

G. First, you must unlock your phone, and enter your Alipay password.

    Why do you run? Different people have different reasons. Whatever your reason, there's one thing we can be sure of: Running is much better injury-free. In his book, Dr. Jordan Metzl's Running Strong, Metzl has the perfect suggestions for enjoying your running without losing your well-being. Here are five must-follow rules for injury-free running:

    ⒈Train for your level of fitness and your goals.

    {#blank#}1{#/blank#} If you run for fitness and your goal is 30 minutes a day, that's cool. But if you are just starting out, you need to get there slowly.

    ⒉Wear the right shoes for your feet.

    You will hear lots of opinions about whether running shoes really help prevent injury and whether you should even wear them. {#blank#}2{#/blank#} And some of you may need a little added assistance from inserts (鞋垫).

    ⒊{#blank#}3{#/blank#}.

    Be honest about how much sleep you need and stick to it. The cool runner is the one who wins the race. Sleep will get you there.

    ⒋Fuel (给提供能量) your body right for running and recovery.

    {#blank#}4{#/blank#} And after workout or race, you need to deliver nutrients (营养物)to all the body rebuilders in your muscles, so they can do their job and get you back into perfect shape for your run tomorrow.

    ⒌Pay attention to pain.

    When pain changes the way you run, stop running. {#blank#}5{#/blank#} And use dynamic rest (动态休息)to stay in shape until you are back on your running feet.

A. Try to find out what's going on and treat it.

B. Get seven to eight hours of sleep every night.

C. Running should be seen as fun rather than pain.

D. Don't run more miles than your body can deal with.

E. A good pre-run meal plan is one that keeps you stepping strong.

F. It is because of the health benefits, including lowering your risk for disease.

G. The right running shoes can help correct foot-movement problems that lead to injury.

New research from the University of Portsmouth has shown a marked increase in shipping in the North East Atlantic. Scientists now warn that more monitoring is required to help protect sea life. 

Researchers at the University of Ponsmouth have discovered that rates (率)of shipping in the North East Atlantic area rose by 34 per cent in a five-year period. The research is the first detailed survey of shipping activity in the North East Atlantic. Researchers used data from over 530 million vessel(船)positions recorded by Automatic Identification System(AIS). They looked at the change in shipping between 2013 and 2017 across ten different vessel types. In total the study area covered 1.1 million km², including waters off Belgium, Denmark, France, Germany,Iceland, Ireland, The Netherlands, Norway, Portugal. Spain, and the UK. 

Lead author, James Robbins said:"This change is likely to put more pressure on the marine(海 洋的)environment, and may influence the protection of at-risk species. Renewed monitoring effort is needed to make sure that protective measures are enough to save species under threat in a changing environment. "

Some of the greatest shipping increases were found in areas close to the Spanish coast. The Espacio Marino de la Costa da Morte saw a rise of 413 percent in vessel activity. It is an area used to protect seabirds. 

Dr. Sarah Marley, Visiting Researcher at the University of Portsmouth, said:"Shipping is the most widespread human activity in our oceans, carrying a set of threats-from unnoticeable effects like underwater noise pollution to serious results when ships hit whales. "

Professor Alex Ford. from the University's Institute of Marine Sciences, said:"Given the well- documented effects that shipping can have on the marine environment, it is necessary that this situation continues to be monitored-particularly in areas used to protect vulnerable(脆弱的)species which may already be under pressure. "

Young people are spending more time in digital spaces. The Internet allows us to connect with people, share ideas, be creative, have fun and discover new things. Unfortunately, young people also face risks online. Common problems include cyberbullying（网络欺凌）, receiving unwanted messages, seeing images and content you don't want to see, or having your private information or photos shared without your permission.

Safer Internet Day（SID）is organized in the second week of February every year, and over 180 countries take part. The aim is to raise awareness of online issues and make the Internet a safer place. SID invites everyone to be part of a big conversation about online issues. This is particularly important for teenagers because they often experience unpleasant situations online, but they don't always feel they can talk about them.

Cyberbullying is when someone uses the Internet to embarrass, threaten or hurt another person. If you experience cyberbullying, talk to an adult you trust as soon as possible. Don't reply to any messages but save the evidence.

Going online often means spending time alone. When you feel down, social media can make you feel lonelier. Using social media might be related to higher levels of depression. So you need healthy social media use.

Whatever app you use, make sure you know who sees your posts and personal information. Limit what people can see, decide who can comment on your content and thwart other users' comment. It may be illegal to share a photo or video of someone without their permission. The SID's website has advice about what to do if someone shares pictures of you that you feel embarrassed about.

There is still a lot we don't know about how time spent online affects people's well-being. But talking about all the issues helps everyone understand common problems and know how to deal with them.