What will people die of 100 years from now? If you think that is a simple question，you have not been paying attention to the revolution that is taking place in bio-­technology（生物技术）. With the help of new medicine，the human body will last a very long time. Death will come mainly from accidents，murder and war. Today's leading killers，such as heart disease，cancer，and aging itself，will become distant memories.

    In discussion of technological changes，the Internet gets most of the attention these days. But the change in medicine can be the real technological event of our times. How long can humans live? Human brains were known to decide the final death. Cells（细胞） are the basic units of all living things，and until recently，scientists were sure that the life of cells could not go much beyond 120 years because the basic materials of cells，such as those of brain cells，would not last forever. But the upper limits will be broken by new medicine. Sometime between 2050 and 2100，medicine will have advanced to the point at which every 10 years or so，people will be able to take medicine to repair their organs（器官）. The medicine，made up of the basic building materials of life，will build new brain cells，heart cells，and so on－in much the same way our bodies make new skin cells to take the place of old ones.

    It is exciting to imagine that the advance in technology may be changing the most basic condition of human existence，but many technical problems still must be cleared up on the way to this wonderful future.

    Devon Gallagher, a college graduate from Philadelphia, wants the world to know exactly here she's been during her worldwide vacation in a special way.

    The traveler, who was born with a bone disease, had her right leg amputated(k)at the age of four. Although the amputation caused setbacks for Gallagher early on, she now sees it as nothing short of inspiration for living her best life.

    To spread that message, Gallagher has taken to social media, where she shares photos of her travels across the globe, but instead of simply using a geo-tag, she writes her location across her artificial leg before taking a picture.

    Now she has been taking pictures across the Continent, which show her cycling over the canal in Amsterdam relaxing on a wall overlooking the city of Barcelona, posing with a waffle in Brussels, taking in the spectacular Parthenon temple in Athens and enjoying a river cruise in Budapest, all with the well-known locations written on her artificial leg “I get a new leg every two years and I can choose the design on it. One day I had a sudden thought to get a chalk-board, "Gallagher said. "My mum and grand-mother weren't too keen on the idea, but my friends thought it was great and told me to go for it, so I did.”

    Gallagher said people often stare when she's writing on her leg, but once she shares the photos she receives only positive feedback. "My leg hasn't stopped me from doing anything I've wanted to do," she said. "I don't know if it's my determination to prove to myself that I can do it, but regardless, I've been able to keep up with my peers and lead a pretty great life, Gallagher shows us that you should never let anything stand in the way of your dreams. And if life gives you an artificial leg, make art

    Some educators told us that more years of school could help students get higher scores on intelligence tests. That was a finding of a study of teenage males in some countries. Now, another research shows that physical activity may help students do better in their classes.

    The research comes as educators in some countries are reducing time for activities like physical education. They are using the time instead for academic(学术的) subjects like math and reading. The studies appeared between 2008 and 2014. They included more than 55,000 children, aged 6 to 18.

    Amika Singh: "According to the results of our study, we can conclude that being physically active is beneficial for academic performance. There are, first, Physiological explanations, like more blood flow, and so more oxygen to the brain. Being physically active means there are more hormones(荷尔蒙) produced like endorphins(内啡肽). And endorphins make your stress level lower and your mood improved, which means you also perform better."

    Also, students taking part in organized sports learn rules and how to follow them. This could improve their classroom behavior and help them keep their mind on their work.

    The study leaves some questions unanswered, however Ms Stash says it is not possible to say whether the amount or kind of activity affected the level of academic improvement. This is because of differences among the studies.

    The researchers said they found only two high­quality studies. They needed more high­quality studies to confirm(证实) their findings. They also pointed out that "results for other parts of the world may be quite different".

    Still, the general finding was that physically active kids are more likely to do better in school. Ms Singh says schools should consider that finding before they cut physical education programs. Her paper on "Physical Activity and Performance at School" is published in the Archives of Pediatric and Adolescent Medicine.

    Ever walked to the shops only to find, once there, you've completely forgotten what you went for? Or struggled to remember the name of an old friend? For years we've accepted that a forgetful brain is as much a part of aging as wrinkles and gray hair. But now a new book suggests that we've got it all wrong.

    According to The Secret Life of the Grown-up Brain, by science writer Barbara Strauch, when it comes to the important things, our brains actually get better with age. In fact, she argues that some studies have found that our brain hits its peak between our 40s and 60s — much later than previously thought.

    Furthermore, rather than losing many brain cells as we age, we keep them, and even produce new ones well into middle age. For years it's been assumed that brain, much like the body, declines with age. But the longest, largest study into what happens to people as they age suggests otherwise.

    This continuing research has followed 6,000 people since 1956, testing them every seven years. It has found that on average, participants performed better on cognitive (认知的) tests in their 40s and 50s than they had done in their 20s. Specifically, older people did better on tests of vocabulary, verbal memory (how many words you can remember) and problem solving. Where they performed less well was number ability and perceptual speed — how fast you can push a button when ordered. However, with more complex tasks such as problem-solving and language, we are at our best at middle age and beyond. In short, researchers are now coming up with scientific proof that we do get wiser with age.

    Neuroscientists are also finding that we are happier with aging. A recent US study found older people were much better at controlling and balancing their emotions. It is thought that when we're younger we need to focus more on the negative aspects of life in order to learn about the possible dangers in the world, but as we get older we've learned our lessons and are aware that we have less time left in life: therefore, it becomes more important for us to be happy.

    With a focus now on the environmental influence over the fashion industry, some bloggers who cut their teeth sharing details of endless clothes and products are changing their direction-enter the "no-buy" movement. The idea is simple: instead of buying new clothes or beauty products, you make a promise to use the things you already own. Some people sign up to a "no-buy year". Others decide not to buy for a few weeks or months or choose "low-buy" with a strict spending cap.

    This life style has caught the attention of many people who struggle to keep up with the latest fashion. Modern people's desire for material things is often not caused by poverty (贫穷) , but by anxiety, which is further enlarged by the rise of social media.

     "Social media puts pressure on people to spend money," says Katherine Ormerod, author of Why Social Media is Ruining Your Life. Many online influencers are given the items they use and wear for free, but Ormerod is determined not to wear any new products she is given. "Really I just want to convince people they don't have to spend a lot of money on fashion to look stylish and there's no such thing as 'last season' anymore," she says. "True style has never been about that anyway."

    However, self-satisfied expressions of minimalist (极简主义的) living have earned plenty of doubts. "Minimalism is a good quality only when it's a choice, and it's telling that its fan base is from the well-off middle class. To people who don't have enough in the first place, celebrations of 'less is more' can sound more like a luxury (奢侈) than a considerable loss." Stephanie Land wrote in The New York Times.

Father's Day is celebrated today in 75 countries around the world. In my personal world, it's a day I like to think of my father's father.

I learned a lot in my later life from my dad. But I learned something else, as a kid not even yet in school, from my grandfather. I learned to be curious. Little things fathers and grandfathers do can change the life of a child forever. In my case, this change came from necessity：My mom needed someone to look after little Allen, barely 4 years old, during the school day. My grandmother volunteered, and my grandfather came up with a way I could be watched while he worked in his clockmaker's shop.

He seated me on a chair every day while I was there, right in front of his big workbench.  He told me stories. He had a great sense of humor and a funny way of making a "buh﹣buh﹣buh" sound when he sensed my attention was weakening, and he encouraged me to ask questions about anything he was doing.

Naturally, I was usually asking questions about clocks﹣what made the hands move, what the pendulum (钟摆) did, why you had to stop winding just before the weight hit the stop.  Sometimes I just asked about which shiny parts went where.

Most of all, he showed me how clocks worked. He treated me as if I were a sort of small grown﹣up. He never talked down to me, never told me I was "too young to understand".

And so my grandfather granted me two things: A love of clocks, and an everlasting curiosity.

As a journalist, I turned that fascination into explanations of why computers and software do what they do﹣﹣and, perhaps even more importantly, why they fail at that task. I haven't been afraid of opening up the innards and looking for what is wrong with the computer.