Global GDP in 2030 will be 14% higher as a result of AI (Artificial Intelligence), thanks to improving labor productivity and increasing consumer demand, says a report.

    The report could increase the enthusiasm of economic policymakers and the public, and show the power of technology in changing not only people's daily lives, but also economic activities. However, history tells us that, while technological advancements have brought us benefits, they have also led to great social disorders, by changing the production and labor structures, and forcing many workers to either adapt to the changes or lose their jobs. In the 18th century, for instance, skilled workers rose up to resist the Industrial Revolution, destroying machinery in the early 19th century. We may not see similar protests today, but history should serve as a warning against the application of AI technology.

    While we may gain a lot of benefits from AI, we must work out plans to reduce its negative effect on society, especially for workers. AI can raise productivity and expand GDP, but it can also make non-adaptive workers jobless. In India, some technology personnel have already felt the negative effect of information technology. As technology industries across the world seek increasing support from automation（自动操作）, robotics and big data analysis, some technology workers have already lost their jobs.

    In their 2013 research study, Michael Osborne and Carl Frey from Oxford University estimated 47% of the jobs in the United States are “at risk” of being automated in the next 20 years. They said jobs in transportation and office and administrative support are at high risk of being automated. And Kaifu Lee recently said that robots could take away about 50% of all jobs from humans in the next decade.

    Those estimates may sound sensational and the impact of technological advancements may not be that serious, as they will also create jobs in new industries. However, policymakers should consider how to better embrace the technological wave to bring benefits while taking action to minimize its negative effects. The government therefore needs to work together with business leaders and social organizations, to promote training programs for potentially helpless workers, in order to make them more capable of adapting to the structural changes in industries and job markets in the future.

    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.

    I first began experiencing anxiety and depression at the age of 14, after being bullied (欺凌) at school for years. While at first anxiety and depression would come and go, it eventually became a constant part of my life.

    I was so eager to find the solution to overcoming my anxiety and depression that I tried everything from when I was in college to graduate school: mood-changing medication, special teas, yoga, anything I read about in books, and advice given by doctors. Despite this, I still felt I hadn't even come close to managing the problem.

    But one afternoon, my eyes fell upon an article in a magazine I was reading that talked about how dogs were able to help people with anxiety and depression. The very next day, I decided to get a dog—a corgi. When I brought my little corgi, Buddy, home. I didn't realize how much he would change my life. It didn't happen right away, however.

    Once the “puppy excitement” went away, my anxiety and depression came back as usual. One morning, I woke up with those familiar feeling again. I didn't want to get out of bed. I turned to pull the covers back over my head and give up. That's when I saw Buddy.

    Buddy started jumping all over me, licking my face, letting me know that it was time to go outside. It was as if he were saying, “There's no time to be sad; the world is amazing!” And for the first time in my life, my life was changing. I really was a new person. This was my new beginning.

    It's been more than a year since that day, and I've never spent another morning unable to get out of bed. I've not cried myself to sleep or spent my days stuck with fear and regret. Sure, I still have days when I feel sad or anxious. But with Buddy, my best friend, by my side, I've finally learned how to manage these feelings and emotions.

    British children generally learn how to ride a bike at a young age. I am an exception to that rule. It's not my dad's fault—he tried to teach me. I remember cycling around the neighborhood. To be honest, though, I never saw the appeal. One of my earliest memories is falling from my bike and into some spiny(多刺的) plants. I definitely didn't want to repeat that.

    So I stopped learning. My dad wasn't going to waste his time teaching someone who didn't want to be taught. Time passed and I accepted that I couldn't ride a bike. It never affected my life in high school because I lived close enough to walk.

    I never felt like I was missing out until I couldn't go on a bike ride with friends in Byron Bay because I was only confident that I could go on a flat surface in a generally straight line. So when the opportunity came up to bike the wall of Xi'an, I wanted to prove to myself that I could do it and make up for missed time. So, with a friend who is very patient, I got on the bike. Instantly nothing came flooding back to me, I had absolutely no idea how to start! "Push off with one foot hard" was my instruction. It sounded simple enough but it just would not happen. Until something clicked and suddenly I was off, going in a straight line on a flat surface and managing to avoid the Chinese tourists who obviously found exaltation on my face.

    At 22 years old, I finally learnt how to ride a bike, and nothing can hold me back.

Africa's Most Amazing Places to Visit

    Pyramids of Giza, Egypt

    The most famous of the structures at Giza, near Cairo, the Pyramid of King Khufu was built around 2650 BC from 2.5 million blocks of stone. Its sides face north, south, east and west.

    Sahara Dunes, Morocco

    The most user-friendly part of the Sahara is accessible from the northern edge of Morocco. You can camp out in Tazzarine, where runners from all over the world complete the weeklong Marathon every spring. The foot of the Merzouga Dunes is the best location for gazing at stars, totally free of light pollution.

    Lake Retba (Lac Rose), Senegal

    There are few pink lakes in the world and one of them, Lake Retba, also called Lac Rose by locals is in the Cap-Vert peninsula in Senegal. The best times to see the lake at its pinkest is during Senegal's dry season, between November and June.

    Nyika Plateau National Park, Malawi

    With a plateau cut by numerous rivers that reach Lake Malawi by way of waterfalls off the eastern edge of the mountains, Nyika, the largest national park in Malawi, is one of the most beautiful in Africa. The eastern border of the plateau forms the wall of the Great Rift Valley. The great domes of hills have gentle slopes, making Nyika perfect for both hiking and mountain biking as well as Jeep exploration.

The blue whale holds the current record as the largest creature to live on Earth, but a collection of bones found in Per u might break that record. Researchers have identified a whale species called Perucetus colossus in the publication Nature. Bones from this species, including backbones weighing over 100 kilograms each and ribs measuring nearly 1. 4 meters long, were found by Mario Urbina in 2012 in the Ica desert.

The area where the bones were found was once underwater, making it a rich source of ocean fossils. The find resulted in 13 backbone vertebrae(脊椎), four ribs and a hip bone. The large fossils date back to around 39 million years ago. Alberto Collareta, a lead writer of the study, described the fossils as unlike anything he had ever seen before.

The researchers used 3D scanners to study the bones' surface and also looked inside. Based on the incomplete skeleton, the team estimated that the ancient creature weighed somewhere between 85 and 340 metric tons. Comparatively, the largest blue whales found fell within that range, at around 180 metric tons. The Perucetus colossus measured about 20meters long, while blue whales can reach 30 meters in length. This means the newly discovered whale was "feasibly the heaviest animal ever," said Alberto Collareta. But he added, "it was most likely not the longest animal ever."

Interestingly, the density and weight of the Perucetus colossus' bones were much higher than those of a blue whale. This suggests that the colossal whale may have inhabited shallower coastal waters, similar to other coastal animals with heavy bones.

Another researcher, Amson, said, without the skull, it is hard to know what the whale was eating to support such a huge body. It is possible that the large creature sought food along the seafloor, the researchers said. Or it could have eaten up tons of smaller sea life in the ocean. Swiesen, a paleontologist, added that he would not be surprised "if this thing actually fed in a totally different way that we would never imagine."