After spending a year in Brazil on a student exchange program, her mother recalled(回忆), Marie Colvin returned home to find that her classmates had narrowed down their college choices. “Everyone else was already admitted to college,” her mother, Rosemarie Colvin, said from the family home. “So she took our car and drove up to Yale and said, 'You have to let me in .' ”

    “Impressed--she was a National Merit (全国英才) finalist who had picked up Portuguese in Brazil. Yale did, admitting her to the class of 1978, where she started writing for the Yale Daily News and decided to be a journalist,” her mother said.

    On Wednesday, Marie Colvin, 56, an experienced journalist for The Sunday Times of London, was killed as Syrian forces shelled(炮击) the city of Homs. She was working in a temporary media center that was destroyed in the attack.

    “She was supposed to leave Syria on Wednesday”, Mrs. Colvin said. “Her editor told me he called her yesterday and said it was getting too dangerous and they wanted to take her out. She said she was doing a story and she wanted to finish it.”

    Mrs. Colvin said it was pointless to try to prevent her daughter from going to conflict （冲突）zones. “If you knew my daughter,” she said, “it would have been such a waste of words. She was determined, she was enthusiastic about what she did, it was her life. There was no saying 'Don't do this.' This is who she was, absolutely who she was and what she believed in: cover the story, not just have pictures of it, but bring it to life in the deepest way you could.” “So it was not a surprise when she took an interest in journalism,” her mother said.

    Sometimes you'll hear people say that you can't love others until you love yourself. Sometimes you'll hear people say that you can't expect someone else to love you until you love yourself. Either way, you've got to love yourself first and this can be tricky. Sure we all know that we're the apple of our parents' eyes, and that our Grandmas think we're geniuses and our Uncle Roberts think that we will go to the Olympics, but sometimes it's a lot harder to think such nice thoughts about ourselves. If you find that believing in yourself is a challenge, it is time you built a positive self-image and learnt to love yourself.

    Self-image is your own mind's picture of yourself. This image includes the way you look, the way you act, the way you talk and the way you think. Interestingly, our self-images are often quite different from the images others hold about us. Unfortunately, most of these images are more negative than they should be. Thus changing the way you think about yourself is the key to changing your self-image and your whole world.

    The best way to defeat a passive self-image is to step back and decide to stress your successes. That is, make a list if you need to, but write down all of the great things you do every day. Don't allow doubts to occur in it.

    It very well might be that you are experiencing a negative self-image because you can't move past one flaw or weakness that you see about yourself. Well, roll up your sleeves and make a change of it as your primary task. If you think you're silly because you aren't good at math, find a tutor. If you think you're weak because you can't run a mile, get to the track and practice. If you think you're dull because you don't wear the latest trends, buy a few new clothes. But remember, just because you think it doesn't mean it's true.

    The best way to get rid of a negative self-image is to realize that your image is far from objective, and to actively convince yourself of your positive qualities. Changing the way you think and working on those you need to improve will go a long way towards promoting a positive self-image. When you can pat yourself on the back, you'll know you're well on your way. Good luck！

    Summer Camps in Season!

    STEM Camp    July 10 to August 14, Cost: $180

    90% of the jobs in the future will require STEM (Science, Technology, Engineering & Mathematics) education. We find ways to make learning fun and exciting for students to help ensure their futures. Campers participate in fun and engaging STEM activities! Register: www.stemcamp.ca or call 519-475-6600.

    Kandalore    June 15 to 28, Cost: $2,340

    The finest traditional camp in Canada, provides the best of both canoe (独木舟) adventures and in-camp activities. For more than 65 years, Kandalore has given campers the opportunity to know and be themselves. We create a warm and supportive environment where kids can express their unique self, grow in self-confidence and build lifetime friendships. Register: www.kandalore.com or call 416•322•9735.

    ESL Summer Camp    June 25 to July 21, Cost: $5,500

    Pickering College has an exciting ESL summer camp for students aged 12－18 who want to learn English and experience the wonders of summer at our 42-acre campus; students enjoy the excellent dormitory, dining, academic, and social facilities of one of Canada's oldest independent schools. Register: www.pickeringcollege.on.ca or call 905-175-8900.

    DEEP Summer Academy    August 16 to 26, Cost: $465

    We provide highly motivated high school students from across the world with the opportunity for advanced study in a variety of engineering, technology, business and science subjects. Organized by the University of Toronto. DEEP is one of the most diverse pre-university engineering programs all over the world with scholarships. Register: www.outreach.engineering.utoronto.ca or call 416-946-0816.

    Why can some people sleep through noises like a honking car or flushing toilet, while others are awakened by the lightest sound?

    To find the answer, sleep researchers at Massachusetts General Hospital conducted an unusual study of 12 self-described deep sleepers. After tests confirmed that the healthy volunteers were solid sleepers, they took part in a three-night study in the university's sleep laboratory. The participants spent the night in a big and comfortable room. But the room also included four speakers positioned near the top of the bed.

    During the night, the deep sleepers were subjected to 14 different recorded sounds, like street traffic, toilets flushing, and an airplane flying overhead. Next door, the researchers monitored their sleep patterns and brain waves.

    As expected, all of the participants slept relatively well, but there were differences in how they responded to the noisy interruptions. Some of the sleepers didn't wake up even when a sound was blasted at 70 decibels（分贝）; others were awakened by sounds at 40 or 50 decibels.

    The researchers discovered that the difference in a sleeper's reaction to noise could be predicted by the level of brain activity called "sleep spindles（纺锤体）". A sleep spindle is a burst of high-frequency brain activity coming from deep inside the brain during sleep. The source of the spindles is the thalamus（丘脑）, a part of the brain that sends sensory information to the rest of the cortex（皮层）.

    Before the study, the Massachusetts researchers theorized that the spindles are the brain's way of preventing sensory information from passing through the thalamus and waking the rest of the brain during sleep. They found that sleepers who experienced the most sleep spindles during the night were also the soundest sleepers and were least likely to be awakened by noise.

    Scientists already know that most people become lighter sleepers with age, most likely because older people experience less "slow wave sleep", which is the deepest stage of sleep. People also produce fewer sleep spindles as they age. But even when controlling for the stage of sleep a person was in, the number of sleep spindles still predicted their risk for awakening because of noise.

    More research is needed, but the findings suggest that a better understanding of sleep spindles could lead to new behavioral or drug therapies for people with sleep disorders. For example, future studies may try to determine whether diet, exercise or other behaviors may influence the number of sleep spindles a person produces during the night.

    When Peng Liyuan stepped off the plane in Moscow, the whole world wanted to know who dressed the elegant first lady. The reporter released the secret—Ma Ke.

    Peng Liyuan has been wearing Ma Ke's designs for more than a decade, a fact that was only highlighted recently when she was on her first state visit, accompanying her husband President Xi Jinping. The elegant and attractive Peng, formerly a popular singer, has been compared with the US' first lady Michelle Obama and France's Carla Bruni-Sarkozy, since stepping off the airplane in Moscow on March 22. Suddenly, everyone was curious to know more about the first lady's wardrobe.

    Even so, Ma prefers a low-key approach. "If you eat a tasty egg why would you want to see the hen?" she says of all the media attention.

    Ma's relationship with Peng began 10 years ago after a concert in Guangzhou when a reporter told Peng she knew the designer behind the label Exception de Mixmind. Peng asked for an introduction because she was a fan of Ma's designs and had been wearing them for years.

    The two naturally became friends. Ma says: "The painting reflects the painter, and clothes reflect both the designer and the wearer. Someone desires fame and wealth, or love and sympathy; what you have in your heart is reflected in the design. Those who don't share my philosophy won't buy my clothes. Peng is a caring person, devoted to charity and environmental protection, which is exactly what I'm doing now."

    However, regardless of the brand, Peng's support of Chinese labels has surprised millions of Chinese who favor foreign fashion brands.

    "Instead she presented a vision of Chinese fashion, desiring to bring Chinese designers to the world stage," says a western designer.

    The first lady's double-breasted coat and her black leather handbag aren't available at any of Exception's shops, though Exception's physical stores do have seen a rising number of visitors.

    Fashions have a lot of rules. Most of them, however, are just wrong. But there's one rule that goes beyond tradition and into the field of scientific study of the brain: Black garments are slimming. It all comes down to how your visual system processes the light. The below holes in each square are the same in size, yet the white hole looks bigger than the black hole.

    In the 1500s, Galileo Galilei noticed that some of the planets looked larger when viewed with the naked eye (肉眼) than they did when viewed through a telescope, making the white light of Venus (金星) appear eight to ten times larger than Jupiter (木星) in the night sky. He knew something strange must be going on with his vision to cause this illusion, but he wasn't sure what it was. Luckily, scientists never stopped wondering, and in 2014, they figured it out.

    Our visual system operates via two main channels: "on" neurons (神经元) that are sensitive to light things and "off" neurons that are sensitive to dark things. When it came to the dark "off" neurons, the researchers found that they responded predictably to dark shapes on a light background — the greater the contrast between the two, the more active these neurons were. But the light "on" neurons behaved unpredictably. Even with the same amount of contrast, light objects on a dark background caused a greater response in these neurons.

    This makes some sense, evolutionarily speaking. In the dark of night, you'd want to be able to take in every bit of light you can get, so a visual system that enlarges light objects on a dark background could be very useful. However, it's not that hard to see dark objects in the light of day. It has some effects in the colors of your clothes and in the appearance of the planets—the brighter appearance of Venus in the night sky makes it look bigger than the darker Jupiter.