You know the feeling-you have left your phone at home and feel anxious, as if you have lost your connection to the world. "Nomophobia" (无手机恐惧症) affects teenagers and adults alike. You can even do an online test to see if you have it. Last week, researchers from Hong Kong warned that nomophobia is infecting everyone. Their study found that people who use their phones to store, share and access personal memories suffer most. When users were asked to describe how they felt about their phones, words such as "hurt" (neck pain was often reported) and "alone" predicted higher levels of nomophobia.

    "The findings of our study suggest that users regard smartphones as their extended selves and get attached to the devices," said Dr. Kim Ki Joon. "People experience feelings of anxiety and unpleasantness when separated from their phones." Meanwhile, an American study shows that smartphone separation can lead to an increase in heart rate and blood pressure.

    So can being without your phone really give you separation anxiety? Professor Mark Griffiths, psychologist and director of the International Gaming Research Unit at Nottingham Trent University, says it is what is on the phone that counts-the social networking that creates Fomo (fear of missing out).

    "We are talking about an internet-connected device that allows people to deal with lots of aspects of their lives," says Griffiths. "You would have to surgically remove a phone from a teenager because their whole life is rooted in this device."

    Griffiths thinks attachment theory, where we develop emotional dependency on the phone because it holds details of our lives, is a small part of nomophobia. For "screenagers", it is Fomo that creates the most separation anxiety. If they can't see what's happening on Snapchat or Instagram, they become panic-stricken about not knowing what's going on socially. "But they adapt very quickly if you take them on holiday and there's no internet," says Griffiths.

    Crossing your legs is an extremely common habit; most people don't even notice that they're doing it when they sit down. While you may find it comfortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of.

    A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason for this is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance(阻力), making it even harder for the blood to circulate. This causes your body to increase your blood pressure to push the blood back to the heart. You won't feel any immediate effects, but repeated, drawn-out increases in blood pressure can cause long-term health problems. So, planning to sit for a long period of time? Don't keep your legs crossed.

    Crossing your legs at the knee can also cause pressure on the major nerve in your leg that passes just below your knee and along the outside of your leg, explains Richard Graves, a medical expert. This pressure can cause numbness and temporary paralysis (麻痹) of some of the muscles in your foot and leg, preventing you from being able to raise your ankle—what we know as that “pins and needles” sensation. While the feeling of discomfort may only last a minute or two, repeatedly crossing your legs until they feel numb can cause permanent nerve damage.

    So next time you sit down, try to get yourself in the habit of sitting with both of your feet on the floor. Not only will it help your posture and stability, but it will also save your health in the long run.

    Adrian Lamo, a Colombian-American threat analyst and former hacker, died in Sedgwick County, Kansas on Friday, at the age of 37. He was best known for passing on information that led to the arrest of Chelsea Manning.

    Lamo first gained media attention in the early 2000s for breaking into several high-profile computer networks, including those of The New York Times, Yahoo, and Microsoft, ending in his 2003 arrest when he eventually turned himself in.

    However, Lamo gained worldwide ill reputation in 2010 for disclosing to the FBI that the U.S. soldier, Chelsea Manning had leaked confidential information to Wikileaks. Manning had reached out to Lamo via a messaging app and told him that he had gained access to hundreds of thousands of classified documents and had leaked to Wikileaks a video of U.S. military forces in a helicopter machine madly gunning down journalists and Iraqi civilians. But, Lamo chose to report him and informed the U.S. military of the leak.

    Held responsible for the biggest leak of classified data in U.S. history, Manning was declared guilty by court martial and was sentenced to 35 years in prison, but was granted mercy by former President Barack Obama, who said his prison term was "disproportionate".

    Looking back on his decision to give up Manning, Lamo told US News and World Report in 2017 that it was "not his most honorable moment".

    However, he added that he had learned a lot from the experience, including that "you can't really know a person or their motives unless you've sat where they sat and seen the situation through their eyes, no matter how much you believe you do".

    It's nothing unusual for people to multitask nowadays. But the ability to do a number of things at the same time could be different between the two sexes.

    A team of UK researchers recently compared the performances of 120 women and 120 men in a computer test about switching(转换) between tasks of counting and shape recognition.

    Men equalled women when tasks were done one at a time. But when the tasks were mixed up, there was a clear difference. According to the paper published in the journal BMC Psychology, both women and men slowed down and made more mistakes as the switching became more rapid. But men were slower, taking 77 percent longer to answer, while women took 69 percent longer.

    To make the experiment more connected to day-to-day life, researchers tried a second test. A group of women and men were given eight minutes to complete a series of everyday tasks, such as finding restaurants on a map, doing simple math problems, answering a phone call, or deciding how they would search for a lost key in a field.

    Once again, women performed better than men in the test, especially in the key-searching task.

    Where do women get the ability to keep organized under pressure better than men? Researchers believe that it has its origins in evolution(进化). In ancient times, women had to keep an eye on children while cooking meals. Meanwhile, men only needed to focus on hunting.

    However, as with all studies, the results don't necessarily apply to every single person in the world. "We don't mean that men can't multitask, or that only women can," researcher Keith Laws of the University of Hertfordshire, UK, told BBC News. "We are saying that the average woman is better able to organize her time and switch between tasks than the average man."

    City: Hangzhou

    Launched: 2008

    Size: 2,965 stations/ 69,750 bikes

    Price: $32.61 deposit（押金）+ time charge

    While taking a look at this city, you may see the best bike sharing in the world. As the second on the planet by size, the Hangzhou Public Bicycle System is one of the most common and useful shares, largely because it's combined with public transportation: a single card can be used in subway, bus, taxi and bike sharing. Residents and tourists can put down a deposit of 200 Chinese Yuan （about $33）and ride for an hour for free in this scenic city. Each additional hour costs only $0.15. It was also the first new﹣generation bike﹣sharing system in China. By 2020 it's projected to have 175,000 bikes.

    City: Barcelona

    Launched: 2007

    Size: 420 stations/ 6,000 bikes

    Price: $61.93 per year

    Barcelona's Bicycling Program developed Spain's bike﹣sharing business in a big way. This program took off like wildfire on wheels, and because four times bigger in one year. It inspired different copycat programs all over the country. Today, Spain has 132 bike﹣sharing systems. The program is one of the world's most respected and popular shares. But it is only open to residents and tourists are not allowed to use it.

    City: Paris

    Launched: 2007

    Size: 1,751 stations/ 23,900 bikes

    Price: $38.52 per year/ $2.26 per day

    Paris's bike﹣sharing is the star of the world. Launched in 2007, it is the world's largest outside of China. Cheap by American standards, you can ride around Paris on a €1.7 day pass— the first half hour of each trip is free. Because this system covers the city with an average of 50 stations per square mile, it's a favourite with both locals and tourists.

    On one occasion, while visiting my parents, I happened to meet the little boy who lived next door. It was obvious that his mother had told him not to come over uninvited. He was standing on the very edge of his yard with an anxious look on his face, seemingly about to burst.

    My father waved him over and performed the introductions. "Eliot, this is my son, Gary. Gary, meet my little friend, Eliot." To my delight, he reached out his small hand and I accepted the formality(遵守礼节) with a smile.

    Unlike most children, this teenager was not shy of meeting a stranger. As a matter of fact, he turned out to be quite a chatterbox. Eliot had me laughing as I listened to the excitement in his voice. for, as you know, it was a big deal to find a toad (蟾蜍)! His descriptions were priceless as I asked the obvious questions concerning the capture(捕捉). He was pleased that I showed interest in his adventure and gladly explained its details.

    Since Eliot seemed so willing to invest in our budding friendship, I asked him a question, "Do you like banjo music?" He got very excited and answered me with a hearty "Yes!"

    I took out my banjo from the car, but when I sat next to him and started playing, Eliot looked at me with a puzzled expression. He asked me "What's that?" in all seriousness.

    My dad and I smiled. The boy who just "loved" the banjo didn't recognize that I was holding one and that what I was playing was "banjo music".

    I realized that his heart was in the right place. Eliot just wanted to please his new friend with that "Yes", thinking it was what I wanted to hear.

    Well anyway...Eliot likes the banjo for real now. And I like Eliot.