“I like photography because it captures amazing things that you might not see again,” Timmy Walsh says. He takes pictures of flowers, sunsets and road signs. But those photos don't usually end up in a scrapbook(剪贴簿) or on his bedroom walls.

    When Timmy was five, he found out that his aunt Bev had lung cancer. He wanted to do something to help her. His first idea was to sell his photos from a lemonade--type stand in front of his house in Pennsylvania. “My mom said it wouldn't work because we were not on a busy street,” Timmy explains.

    His next idea was to have an art show. Timmy decorated his home with candles, flowers, and white lights. Then he arranged his photos. Timmy's mom, Sheila, remembers: “Our dining-room table was filled, the living room—everything was filled with photos.” Friends, family, and Timmy's teachers came to the show. He raised more than $300 for cancer research that night. Aunt Bev was “very happy and excited,” he says.

    After a local newspaper wrote a story about Timmy's photos, a volunteer offered to help him set up a website. As people learned about his cause, called Camera for a Cure, Timmy began receiving invitations to sell his pictures at art galleries and fund-raisers. Since then, his work has appeared in more than 20 shows.

    When Timmy is at a show, he greets each customer and talks about what he was thinking when he took his photos. And he always shares facts about lung cancer. Sometimes donations and sales are slow, but that doesn't bother him. “It doesn't matter how much money we made because we just raised awareness,” he says. Timmy knows that finding a cure for lung cancer will take time and effort. So Timmy will keep doing his part by shooting and selling photos of the things he sees.

    The purpose of keeping fit is to avoid illness ,resist the mental and physical fatigue（疲劳）that make us more likely to contract infections ,and above all to feel more pleasure in being alive. Research has shown the value of a balanced diet ,fresh air, sunshine ,enough rest and some forms of regular exercise for everyone .If everyone followed this plan ,the number of people visiting the doctor and going to hospital would be considerably reduced.

    Unfortunately, although most people acknowledge the importance of physical fitness, not enough of us put this into practice .We spend too much time watching others from the comfort of an armchair or a seat in the stand at a sports stadium.

    One reason why people who are physically fit to live longer is that they do not put the heart under excessive strain（过度劳累）and so they reduce the risk of heart and blood vessel（血管）diseases .They also avoid suffering the consequences of weakened muscles ,which are the cause of a great deal of back and abdominal（腹部的）trouble.

    About 640 muscles for about 45% of our body's weight, they must have the ability to store energy and be continually supplied with fuel by the blood .Sensible exercise, suited to each individual and preferably undertaken on the advice of a doctor, is the best insurance of meeting these requirements.

    Siri, whose voice do you have?

    The question has interested millions of Apple iPhone and iPad fans, who use the devices' Siri function for help with everything from finding restaurants and directions to organize their day.

    On Friday, CNN reported it had discovered the original voice. The person had never before been identified publicly.

    The network named Susan Bennett, a voice-over actress（配音演员）from Atlanta in the US, as the voice behind Siri, which was first introduced on Apple's iPhone 4s in 2011.

    "I'm the voice actor who provided the voice of Siri," Bennett told CNN in an interview.

    Bennett told the network she worked four hours a day for the entire month of July 2005 recording in her home. She said she was paid by the hour but would not reveal the amount.

    "A colleague emailed me and said, 'Hey, we've been playing around with this new Apple phone. Isn't this you?'" Bennett told CNN.

    Her voice may also be familiar to airline passengers who have passed through a Delta Airlines terminal.

    Bennett also provided the radio and TV voice of First National Bank's "Tillie the All-Time Teller", the first ATM machine, she told CNN.

    "I began my career as a machine many years ago," Bennett told the network. "I'm sure that you hear my voice at some point every day."

    Many young people these days adore the advertised magazine body and become too focused on attaining this image instead of worrying more about what lasts and even grows over time. But could you imagine being considered beautiful for years, and suddenly being ugly after moving to another continent? It is a sad reality that people don't realize how vacillating the idea of beauty can be from one country to another.

    Think of the most typical American girl you know. Is she blonde-haired with white skin and light blue eyes, and does she love shopping or sports? Now place this girl in the heart of Africa, where beauty is placed on what you can control. The Maasai tribe in Kenya focuses on how clean people are, and how stylish their piercings (穿孔) are. This tribe's culture is to be a brave fighter, so they will cut their skin with patterns in it to show that they are strong. If you don't look fierce, you are not beautiful.

    Other countries like North Korea and South Korea have their own unique views on beauty. In an interview, a woman who has lived in both North Korea and South Korea claims that beauty in North Korea is based more on your ability to be a good woman and wife. She says that women in North Korea are less concerned about fashion and beauty in the physical sense. She says they did have a time when big eyes were a big deal and everyone wanted to get double eyelid surgery. This is something extreme and could perhaps be influenced by Western culture. But don't you think the idea of getting surgery done to look more attractive is crazy?

    Every time your fingers touch your cell phone, they leave behind trace of amounts of chemicals. And each chemical offers clues to you and your activities. By studying them, scientists might be able to piece together a story about your recent life, a new study finds.

    A molecule (分子) is a group of atoms. It is the smallest amounts of some chemicals. Your skin is covered in molecules picked up by everything you touched. With each new thing your skin contacts, you leave behind some small share of what it'd touched earlier.

    Researchers at the University of California, San Diego (UCSD) recently studied such chemical leftovers on the phones of 39 volunteers. The study was led by biochemist Amina Bouslimani. To explore those residues (剩余物), the UCSD team wiped the surface of each volunteer's phone with a cotton swab (药签). The scientists also swabbed each person's right hand. Then the researchers compared the chemicals found on each cell phone.

    The scientists discovered as many of the molecules as they could. They then compared those to a database of chemicals. Pieter Dorrestein, a UCSD pharmaceutical chemist, had helped set up that database a few years earlier, which contains various substances, including spices, caffeine and medicines.

    Traces of everything from hundreds to thousands of different molecules turned up on each phone. The molecules suggested what had been in the body, and what each person had handled before touching the phone. From all these molecules, Bouslimani says, “We could tell if a person is likely female, uses high-end cosmetics (化妆品), colors her hair, drinks coffee, prefers beer over wine or likes spicy food.”

    Police already use molecular analyses to look for traces of explosives or illegal drugs. To date, Dorrestein says, he's never heard of police using phone residues to narrow down behaviour clues to search for a suspect. But detectives might one day use such data to track down someone who left a phone behind at a crime scene.

    Vacation in the U. S. usually means slower days, and no school teachers know, however, that vacation means students will likely fall behind, and forget things they learned during the year. Simon Vanderpool, a special education teacher in Lexington, Kentucky, decided to do something about it.

    He started a program called Books and Barbers. Children go to the barber, choose a book and read out loud while the barber cuts their hair. The child gets a sticker and can take the book home. And there is an added bonus: money. The kids get paid to read.

    Vanderpool says barber shops are places where kids can feel comfortable. "Once a student feels comfortable, that's whenever the brain opens up, and that they are able to start focusing on nothing but learning." Amir Shalash owns a barber shop. But he is doing more than cutting children's hair. He is listening to them read, and helping them with their reading.

    Most of the children getting haircuts at barber shops are boys. Vanderpool's idea was to do more than just help them with reading and money. The teacher wants to help kids who are growing up in a home without a father liike he did. Also, I created the program in order to provide a positive mentor(指导者）for the kids that go into the barber shop, and are able to have someone that they can rely on and they can trust in, and just build a bond between the two of them." Shalash says he and his fellow barbers like being mentors.

    "The biggest thing is that we try to influence as many kids as we can, and that was my whole intention of it."