Scientists found that sleeping considerably improves our creativity. After taking a nap people are able to think faster and put more imagination into their thinking. Besides, if we dream, the thinking abilities are improved even more.

    Researchers consider that sleeping on a problem in most cases leads to elucidation(解释). They say when a person enters a phase called Rapid Eye Movement (REM) during sleep, it increases the effect. Such phase takes place right before we awake and according to scientists it helps our brain make links between unrelated subjects.

    In the study, led by Professor Sara Mednick, scientists made a conclusion that the REM was "important for assimilating(消化) new information into past experience" in order to find solutions to creative problems.

    Prof. Mednick is a psychiatrist at the University of California. Her study involved the analysis of 77 adults. Each participant was given several word-associated creative tasks. All tasks were given in the morning, with participants being shown a number of groups of 3 words, for example: cookie, heart and sixteen. They were asked to come up with a word that would be associated with all three given terms—like sweet. Sometime later, after some participants were allowed to sleep, they were asked to perform the same tasks and some new ones. It is worth mentioning that while some people slept, researchers used brain scans to see the type of sleep each participant entered.

    When given the same tasks, participants, who took a nap, were able to give more varied solutions, some of which were much better than they gave earlier. But when given new tasks, researchers found that those who entered REM sleep had a 40 percent better result compared to the performance they showed in the morning.

    As we know, DNA testing is very useful for crime fighting. But now crime fighters could have a new tool at hand. Researchers have developed a cutting-edge (前沿的) technique to identify human hair. Their test is quicker than DNA analysis techniques currently used by the police.

    DNA testing is commonly used for identification because DNA is unique to each individual. However, environmental and chemical processes can degrade(降解) DNA, limiting its usefulness over time. Protein (蛋白质) in hair, on the other hand, is more stable than DNA but can also have variations (变异体) that may be unique to the individual.

    “Our analysis process can be used universally, ”says Ms. Huang, “One of our samples even included dyed hair and the test was 100 per cent accurate. The test was able to distinguish East Asians, Caucasians and South Asians.”

    Dr. Beauchemin says she has got in touch with law enforcement agencies about using the new technology. She is also planning to collect more hair samples and continue her research with a goal of finding where exactly in the world hair sample is from, to look for more races and determine specific age.

    “We are in a very similar place with protein-based identification to where DNA testing was during the early days of development,” said chemist Brad Hart. “This method will be a game-changer, and while we've made a lot of progress toward improving it, there are steps to go before this new technique is able to reach its full potential.”

    Two men, Alan and Henry, both seriously ill, shared a hospital room. Alan was allowed to sit up in his bed and his bed was next to the room's only window. Henry had to spend all his time flat on his back.

    The men talked for hours, of their wives, families, their homes and their jobs. And every afternoon when Alan, in the bed next to the window, could sit up, he would pass the time by describing to his roommate all the things he could see. Ducks and swans played on the water while children sailed their model boats. Lovers walked arm in arm among flowers. Trees and skyline could be seen in the distance. As he described all this, Henry, on the other side of the room, would close his eyes and imagine the scene.

    One warm afternoon Alan described a parade (游行) passing by. Although Henry could not hear the band, he could see it in his mind. Unexpectedly, an alien thought entered his head: why should he have all the pleasure of seeing everything while I never got to see anything? It doesn't seem fair. Henry felt ashamed at first. But as the days passed and he missed seeing more sights, his envy grew and soon let him down. He began to find himself unable to sleep. He should be by that window — and that thought now controlled his life.

    Late one night, as he lay staring at the ceiling, Alan began to cough. He was choking. Henry watched in the dim room as the struggling man tried hard to reach for the button to call for help. Listening from across the room, he never moved, never pushed his own button which would have brought the nurse running. In less than five minutes, the coughing and choking stopped, along with the sound of breathing. Now, there was only silence — deathly silence.

    As soon as it seemed appropriate, Henry asked if he could be moved next to the window. The nurse was happy to make the switch and after making sure he was comfortable, she left him alone. Slowly, painfully, he struggled to take his first look. Finally, he would have the joy of seeing it all himself. He looked out, but faced a blank wall.

    Researchers in China and the United States have developed a new cataract(白内障)treatment with cells that has restored vision in babies in a trial and may eventually be used in adults.

    The treatment-by doctors and staff members at the University of California, San Diego School of Medicine and Sichuan and Sun Yat-sen universities in China-was published in March 9 edition of the scientific journal Nature.

    A cataract is a clouding of the normally clear lens(晶体)of an eye. Typical cataract operation involves the removal of the cloudy lens and the insertion of an artificial one. The new operation has been tested in animals and during a small, human trial. It resulted in fewer complications(并发症)than the current harmful operation, and in regrown lenses with superior visual function in all 12 of the baby cataract patients who received the procedure.

    A congenital cataract-lens clouding that occurs at birth or shortly after- is important cause of blindness in children. In the new research, K and Zhang, head of ophthalmic genetics at US San Diego's Shiley Eye Institute, and his colleagues relied on the regrown potential of endogenous(同源的)stem cells.

    According to Zhang, endogenous stem cells are different from other stem cells that are typically grown in a laboratory, transplanted into a patient, and can have risks of immune（免疫的）rejection, infection or cancers. Zhang told CBS News, “We invented a new operation to make a very small opening at the side of a cataractous lens bag, remove the cataract inside, allow the opening to heal, and promote potential lens stem cells to regrow an entirely new lens with vision.”

    The human trial involved 12 babies under the age of 2 who were treated with the new method, while 25 babies received the standard operation care. The latter group experienced a higher incidence of post-operation danger, early- onset eye high blood pressure and increased lens clouding. The scientists reported fewer complications and faster healing among the 12 babies who has the new procedure.

    Nowadays, most people have a device that features artificial intelligence (AI), with the likes of Siri always there to greet us with a friendly voice.

    But Microsoft's XiaoIce is different. Launched in 2014 for the Chinese market, "she" has a creative advantage over her competitors. While most AI assistants simply read out information they get online, XiaoIce has a "realness" that the others are short of. Indeed, if you asked nicely, she could read you a poem from the weekly column in China Daily.

    The newspaper has been printing XiaoIce's self-penned poetry each week since Aug 19, taken from her own book of poems, The Sunlight that Lost the Glass Window.

    To turn XiaoIce into a master of poetry, Microsoft scientists "fed" her the works of over 500 influential modern poets, reported China Daily.

    This led to her figuring out a writing style of her own and creating over 70,000 original poems. Most of the poems are so comparable to those written by humans that they cannot be easily distinguished, and XiaoIce's book even got good feedback from experts.

    "XiaoIce's work carries a strange taste. The more you chew on it, the more interesting it becomes," Scholar Zhang, a literature professor at the Nanjing University of Science and Technology, told China Daily.

    However, it seems not everyone is a fan. "The poems dissatisfied me with their slippery tone and rhythm. The sentences were aimless, lacking the inner logic for emotional expression," Yunnan-based poet Yu told China Youth Daily. This isn't the first AI to attempt poetry. Last year, Google's Parsey McParseface made some poems of its own, although they were branded "wrongly" by reviewers. While it seems like AI is becoming more "intelligent" and less "artificial" all the time, when it comes to creativity, perhaps this is one job that software should leave to us humans.

    It was late one evening. I can't remember what it was about, but my dad and I had a very big argument when my mom was away. We both said things we didn't mean, and in the end I said, "I'm leaving." And he said, "Good. The sooner, the better."

    I threw a few things in a suitcase and closed the door angrily behind me, not knowing where I was going. After walking aimlessly for about 20 minutes, I stopped at a local supermarket. Then my phone rang. It was my mom calling. She said, "Hey, Mary. Where are you？Dad is worried about you."

    "How can he worry about me？I've been away for nearly half an hour, but he didn't call," I said with annoyance(气恼). My anger returned and I remembered all the hateful things he'd shouted to me. "Listen, Mom. You can tell Dad that I'm fine. I'll call you tomorrow," I said and hung up.

    I walked around the store, trying to get my thoughts together. By the time I paid for my purchases, it had been much later than I used to be out alone. When I left the supermarket, a large piece of white paper was in front of me. On the piece of white paper were these words: "Please come home! I miss you and I'm worried about you！"

    Then a car pulled up beside me. Hanging out of the window was my dad. Beside him, smiling gently, sat my mom. And that's when I started laughing. I laughed so hard that I cried. Despite my best efforts to run away from home, my father finally managed to track me down. I couldn't leave now, not with him sitting there with caring eyes.