Dust on furniture may be bad news for waistlines (腰围). But it's far too early to add dusting to a weight-loss plan. Dietary fats and other materials that make up indoor dust can send a signal to human fat cells, telling them to grow. That process, in turn, might slow the body's rate of burning energy. Such changes could add to any weight problems a person might have.

    “We don't know what that means to long-term health and certain diseases yet,” says Heather Stapleton, one of the study's authors. But she notes that her team's findings also raise a question of whether pollutants in dust might play some role in the growing, global problem of obesity (肥胖).

    Stapleton and her colleagues collected dust from homes and offices. Studies found that some materials in the dust could turn on a protein (蛋白质) called PPAR-gamma 1. It's found in many human tissues. Turning this protein on can cause fat cells to grow. Researchers think this protein may be involved in obesity. But a second study now finds evidence that certain fats are mostly to blame. Cooking oils may send out some of these fats into the air, where they eventually find their way into house dust. Or, the authors say, the fats might enter house dust as part of the hair or skin cells shed (脱落) by people or pets.

    “While the findings are amazing,” says Mitchell Lazar, another study author, “these findings need to be taken as very limited.” Indeed, he adds several cautions about how the findings should be understood. “For one thing, people eat these fats in foods all of the time. That is likely to be a lot more than would be consumed from indoor dust,” he said.

Make a five-minute film and win!

    Do you love the summer holidays but hate being bored? Then why don't you enter the Film Street Summer Shorts Competition by making a short film this summer with your family and friends?

What you have to do

    To enter the competition, you have to make a short film that around 5 minutes long (It can be shorter but not longer!) on a digital camera, or mobile phone.

Awards

    The best short film entered into our competition will be shown in Film Street's Cinema and you'll win a Cineworld Cinemas pass for yourself and there more for other members of your film crew. If you have a Cineworld Cinemas pass, you can watch as many films as you like for a year, for free, at any Cineworld Cinema!

Rules

.We can't show films that tell others about either your, or any other kids', name or address.

.We can't show films that hurt, harm or insult(侮辱） other people。

.We can't show films that have bad language.

Copyright Checklist

Getting permission to use someone else's work in your film can be expensive, so check your film to make sure that:

.Your film is original and you haven't copied someone else.

.There are no scenes of branding on shop signs, books, magazines or CDs.

.There are no scenes of someone else's artwork.

Address and Date

Post your finished film on tape, CD or DVD by Monday, October1st, 2007 to:

Unit 6,Third Floor, The Bond

180-182 Fazeley Street; Birmingham

    So what's stopping you? Start making your Film Street Summer Short now!

    Five weeks ago I had a total hip replacement surgery (髋关节置换手术). In Canada, we have great healthcare system. That means we get our new hips for free.

    My hip had been hurting me for years before I went to the doctor. Of course, it was free. She referred me to a surgeon, but the earliest appointment was in 10 months. That is what being free gets you. Ten months later, after some free X-rays, the surgeon told me I needed a surgery, which was about an 18-month wait, for some senior citizens had been on the operation list. Another 18 months! I dragged myself out of the surgeon, s office.

    Walking through the hospital, I thought about the situation. As the breadwinner of a large family, I couldn't wait that long, so I had to get to the front line. I was fully aware of what a Canadian should be like (Canadians are usually considered gentle and caring), but this time I really needed to fight for myself. At that very moment, in the shop window of the hospital, I saw a sign which read, “Volunteers Needed.” Suddenly, an idea occurred to me — I would get the job. Fortunately, they signed me up immediately because the average age of the volunteers at the shop was 75. They were desperate for some young blood.

    Every Friday morning, I was at the shop. While seeing the hospital staff, I'd casually ask, “What do you do?” Then I'd tell them, “Well, I'm getting my hip replaced — in 18 months.

    It's going to be so great when the pain stops.” Soon, all the staff got to know me. Naturally, in my next appointment, the surgeon recognized me. Moments later, I had a surgery date just weeks away.

    I had to say it was actually my volunteering that got me to the front of the line. And I'm not ashamed of it, for I intend to stick with the volunteering. Also, even when I cheated the system, I did it in a way that benefits society.

    You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

    Jane Addams (1860-1935)

    Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.

    Sandra Day O'Connor (1930-present)

    When Sandra Day O'Connor finished third in her class at Stanford Law School, in 1952, she could not find work at a law firm because she was a woman. She became an Arizona state senator(参议 员) and ,in 1981, the first woman to join the U. S. Supreme Court (最高法院). O'Connor gave the deciding vote in many important cases during her 24 years on the top court.

    Rosa Parks (1913-2005)

    On December 1,1955, in Montgomery, Alabama, Rosa Parks would not give up her seat on a bus to a white passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott (联合抵制). It lasted for more than a year, and kicked off the civil-rights movement. "The only tired I was, was tired of giving in," said Parks.

Teen Volunteers

    The zoo supports future conservation by having the youth involved in voluntary jobs. We have popular summer year-round programs that are designed to be fun and educational while building job readiness skills and inspiring youth to appreciate, care for, and conserve nature.

    ◆Zoo Crew

    Volunteer on a team to restore wildlife habitat at Lake Merced and Mountain Lake in San Francisco.

    Ages11-14

    Program runs: September through June

    Hours: One Saturday per month, form 10 a. m. to 12 p. m.

    The Zoo Crew will hold a necessary training for all prospective volunteers in August at the Zoo.

    ◆Nature Trail

    Nature Trailers work in close proximity (接近) to the Zoo's ambassador animal collection, and teach guests about adaptations and conservation. Nature Trailers will learn to handle a few small mammals and reptiles.

    Ages 12-14 (must be 12 by Memorial Day)

    Program runs: Memorial Day to Labor Day

    Hours: 2 days per week, 10 a. m. to 4: 45 p. m.

    ◆Talk on the Wild Side

    Learn to handle amazing animals like livestock and arthropods (节肢动物) while giving informational talks to zoo visitors. Use biofact carts to educate the public.

    Ages 14-17

    Program runs: Memorial Day to Labor Day

    Hours: 2 days per week, 9: 30 a. m. to 4: 30 p. m.

    ◆Zoo Teacher Assistant

    Help kids explore the world of animals through zoo tours, crafts, games and assist Zoo Camp teachers with activities. Gain practical work experience with children.

    Ages14-17

    Program runs: mid-June through mid-August

    Hours: A daily half-day or full-day shift for a minimum of four weeks over the course of the summer.

    Listed here are four of the thousands of impressive museums around the world.

    The Guggenheim Museum Bilbao in Bilbao, Spain

    Built in 1997, the Guggenheim Museum Bilbao is one of the newest in the world. It has transformed the industrial city of Bilbao into a travelers' desired destination. The beautiful architecture of the museum has provided a dramatic background for movies and commercials.

    The Louvre in Paris, France

    Probably the most famous Louvre also holds the most famous painting in the world, the "Mona Lisa" by Leonardo da Vinci. Crowds can be found any day surrounding the small, but mysterious painting of the smiling woman. But, the Louvre is much more than a home to the "Mona Lisa". The Louvre is visited by more people each year than any other museum in the world.

    The Barnes Foundation in Philadelphia, America

    Just opened in its new downtown location in 2012, the Barnes Foundation is "unique" in that it is a completely reproduced display from one man's private collection. Dr. Albert C. Barnes started collecting art in the early 20th century and collected, among others, the largest number of original Renoir paintings in the world.

    The Uffizi Gallery in Florence, Italy

    Walking on the marbled floors feels like stepping back in time. The building itself is a beautiful palace—like structure with frescoes(湿壁画) decorating the ceilings and walls. Viewers are bowled over(印象深刻) by the works by Botticelli, such as "The Birth of Venus". Classic artworks from nearly 1, 000 years ago describe religious events of the time.