Mom wanted only one thing for her birthday. “Can you find me another copy of this song?” she asked, and handed me a worn-out cassette tape (磁带). I knew exactly what was recorded on it: My Redeemer (救世主). I heard the song played at least a thousand times while growing up. After so many years, the cassette tape was too worn out to be used. I promised her I would find a replacement.

    My Redeemer became Mom's favorite song after my younger brother Tim was killed by a drunk driver in 1973. The only thing that helped her calm down was the soulful sound of My Redeemer from the local radio station.

       We recorded it on a cassette tape so she could listen to it any time she wanted but none of us knew who the soloist (独唱者) was. These days, I thought the song would be easy to find out. I went home and searched the Internet. Several songs with that title popped up, but none of them was the one Mom loved. I got frustrated.

    Mom's birthday drew near and then one day, I was driving home, listening to our local radio station. A familiar tune came on. It was My Redeemer! As soon as I could, I phoned the station. I got a line on the soloist, who was called Alan Parks. I typed his name into Google and found his home number in South Carolina. Minutes later, I was telling him how much his recording meant to Mom. He offered to ship two CDs out to me personally. I gave him my address.

    'Red Lion, Pennsylvania?' he said. 'Do you know the Logans?' 'They are our neighbors!' 'I've been friends with them for 25 years,' Alan said. 'They'll be at my concert at York Gospel Chapel on April 17th. Would you and your mom come too” We sure would. Mom was excited to hear Alan sing My Redeemer to her, live in concert —on the evening of her 87th birthday.

    Dr Dian Fossey, one of the world's leading women scientists, had a remarkable career. The work she devoted her life to protecting and studying the mountain gorillas (大猩猩) of Africa—has proved highly effective and has resulted in the steady (平稳的) increase of this most endangered great apes.

    Fossey made her first trip to Africa in 1963. Three years later, she returned to Africa to begin a long term study of the mountain gorillas. She set up camp in the Democratic Republic of Congo but moved to Rwanda because of political reasons in 1967. She established her "Karisoke" Research Centre camp on September 24, 1967.

    Fossey's aims were to study gorilla ecology (生态学) and social organization. She found that in order to achieve this, she needed to recognize individual gorillas, which required that the gorillas get used to her presence (出现). By copying gorillas' behaviour and sounds, Fossey began to gain their trust, and in 1970 an adult male gorilla she had named "Peanuts" reached out to touch her hand.

    Close observations over thousands of hours enabled Fossey to gain the gorillas' trust and bring forth new knowledge about their behaviour. Stories and photographs of her work were published in National Geographic Magazine and elsewhere.

    In 1977, one of Fossey's favorite gorillas, Digit, was killed by poachers and she established the Digit Fund to help raise money for gorilla protection efforts in the same year.

    On December 26, 1985, Fossey was murdered while going back to her house in Karisoke. Her body was discovered near the research centre. Most probably? Dian Fossey had been killed by the poachers she'd fought against. On her tombstone (墓碑): "No one loved gorillas more..."

    In 1988, the life and the work of Fossey were made into a movie based on her book.

    Wong Fuk-wing, a Hong Kong volunteer at an orphanage (孤儿院) in Yushu, was killed in the earthquake when he was trying to save others on April 14, 2010.

    Wong managed to run safely out of the building with some children when the first quake happened at 7:50 am on April 14, but he went back inside to rescue three other children and three teachers inside, although he knew the danger of aftershocks (余震).

    At 10 am, all the children and one of the teachers were saved. However, Wong was buried under the fallen building and died. The other two teachers were still waiting to be rescued.

    46-year-old Wong was a truck driver, who often said he could only give his efforts to charity instead of money, as he did not earn a lot. His tragic (悲剧的) end touched the hearts of many people both in Hong Kong and on the mainland.

    Wong began volunteering in 2002. In 2003, Wong was told by the doctor he got serious illness, which gave him a great blow. However, the illness did not deter the warm-hearted man. When the earthquake struck Wenchuan in Sichuan Province in 2008, Wong rushed to the disaster area of Shifang to offer his help though his family did not want him to go.

    In fact, Qinghai is a place Wong had often visited since 2006. As a volunteer, he gave out medicine and clothing to the orphanage there. No one could expect that Wong would die helping others.

    Hong Kong Chief Secretary Henry Tang Ying-yen said he had "the highest respect" for the hero who gave his life for others. "What he did has shown the Hong Kong spirit." The citizens of Hong Kong called him "the pride of Hong Kong's people" and people on the mainland have also praised him as "a true hero".

I was ever bullied badly when I was in high school. One kid in particular would try to make me feel worse in every way he knew. For example, he would throw stuff at me constantly, hit me on the head, punch me, call me ugly and stupid, make fun of me and, of course tell me he would beat me up if I ever fought back. It was like his daily mission. And it was my daily mission to just get through the day. What could I say? It made my world very small because that was my main focus—just surviving. Everything else fell by the wayside. Unfortunately, that included any form of social life. So not only was my world tiny, but it was very lonely.

    Looking back to that time, which was about 11 years ago, my biggest mistake was not bringing anyone into that world of mine. I was too proud and embarrassed to get help. I would rather not face the fact that I needed help because in my mind, that would mean that the bully had won. It would also mean that I was weak.

Let me just say this—-bullying someone is a weak choice. The only reason why they come after you is that they don't think you will do anything about it. Does that make anyone strong? Absolutely not. Be stronger. Reach out to a parent, a teacher or a friend for help. Simply admit that you are struggling and need help.

    You can put it like this: Somebody who is weak and trying to build himself or herself up has chosen to do that by putting me down. The only reason why they are doing it is that I am nice and I haven't done anything about it yet. Well, I am through putting up with this. I have basic human rights that they are trying to take away to feel better and that is just not OK. How do I handle this the right way? I don't want the pain cycle to continue and I don't want to become someone I don't want to be.

I will close by saying this—-I am not just surviving. I am just enjoying my life. I graduated from college with honors, by the way. You don't have to wait to live. Do something today.

    They still bite, but new research shows lab-grown mosquitoes are fighting dengue fever — a dangerous disease that they normally would spread. Dengue infections appear to be dropping fast in communities in Indonesia, Vietnam, Brazil and Australia that are filled with the specially grown mosquitoes.

    Researchers first injected (注射)mosquito eggs with Wolbachia bacteria that's common in insects and harmless to people in a lab. Infected females then pass the bacteria on through their eggs. Releasing enough Wolbachia carriers, both the females that bite and the males that don't, allows mating(交配)to spread the bacteria through a local mosquito population.

    Rather than using chemicals to wipe out pests, "this is really about transforming the mosquito," said Cameron Simmons of the nonprofit World Mosquito Program, which is conducting the research.

    The first success came from Australia. Mosquitoes carrying Wolbachia were released in parts of North Queensland starting in 2011, and gradually spread through the local mosquito population. Dengue is spread when a mosquito bites someone who is infected, and then bites another person, but somehow Wolbachia blocks that — and local spread has nearly disappeared in those North Queensland Communities, Simmons said.

    The studies are continuing in other countries. But the findings, presented at a meeting of the American Society for Tropical Medicine and Hygiene, suggest it's possible to turn at least some mosquitoes from a public health threat into annoying biters.

    The work marks "exciting progress," said Michigan State University professor Zhiyong Xi, who wasn't involved with the project but has long studied how Wolbachia can turn mosquitoes against themselves.

    More research is needed, specialists cautioned. "The results are pretty exciting — strong levels of reductions — but there clearly are going to be things to be learned from the areas where the reductions are not as great," said Penn State University professor Elizabeth McGraw.

Every day, as I took long walks through North Vancouver, I would think about the potential joys of a physically closer network. Wouldn't it be great to have someone who could join me at a moment's notice? How good would it be to have more non-scheduled hangs instead of ones that had to be planned weeks in advance?

This doesn't have to be just a dream. Although technology is making it easier to maintain long-distance connections nothing can replace seeing friends in person. Researchers have found that happiness spreads "like an emotional contagion (传染)", especially among those who live close together.

Friends who live in the same city could decide to move within walking distance of one another — the same neighborhood, block, or even apartment building. Doing so would likely involve a lot of effort, but the resulting community could pay emotional dividends for years. Doing so would make it easier to support one another materially and emotionally.

Moving close to your friends requires some masterminding. Cities can make doing so easier by ending single-family zoning codes and encouraging a variety of housing types in neighborhoods. But even without official policies, people can make it work on their own. Sam Unger, 32, a food scientist and a friend of mine, has created a chosen family like this in Montreal, where about 15 of her friends live within walking distance of one another. When someone moves away, they try to transfer (移交) their lease (租约) to other friends. And when pals based elsewhere in the city are looking to move, Unger will try selling them on the positives of her neighborhood and sometimes even look for housing for them. "It's funny," she told me. "The other day, I bought a fire extinguisher, and she's like, ‘Oh, well, I have one. You could just call me if you had a fire, and I'd be right over with it.'"