In American schools there is something called Homecoming Day. Many high schools and colleges with a football team have a homecoming game. This can be the most important event of the year except graduation or commencement day(毕业典礼)．Students plan Homecoming Day for many weeks in advance.

    Several days before Homecoming，students start to decorate the school. There are signs to wish luck to the team，and many other signs to welcome all the graduates. Many people still come to Homecoming twenty or thirty years after their graduation.

    The members of school clubs build booths(摊位) and sell lemonade(柠檬)，apples and sandwiches. Some clubs help to welcome visitors.

    During the day people like to look for teachers that they remember from long ago. Often they see old friends and they talk together about those happy years in school.

    Everyone soon comes to watch the football game. When the game is half over，the band comes onto the field and plays school songs. Another important moment is when the Homecoming Queen or King appears. All the students vote a most popular student. It is a great honor to be chosen.

    Homecoming is a happy day，but it is not perfect unless the football team wins the game. Even if the team loses，the students still enjoy Homecoming. Some stay at the school to dance，and others go to a party. For everyone it is a day worth remembering.

    When I began planning to move to Auckland to study, my mother was a little worried about the uncertainty of living in a place that was so different from India, where we lived. She worried particularly about the lack of jobs, the cultural differences and the chance that I would face racism(种族偏见).

    Despite these worries, I came to New Zealand in July 2009. I have found the place and people very nice and supportive. Soon after I arrived, I realized the importance of getting a job for my living expenses.

    Determined to do this on my own, I spent a whole day going door to door asking for a job. However, I received little response. This became my routine every day after college for a few weeks.

    One afternoon, I walked into a building to ask whether there were any job opportunities. People there were very surprised, and advised me not to continue my job search in that manner. As I was about to leave, a clerk in the building, who had been listening to what the others had said, approached me and asked me to wait outside for a while. Fifteen minutes later, he returned. He asked me about my plans and encouraged me to stay confident. Then he offered to take me to Royal Oak to search for a job.

    I was a little surprised but had a good feeling about him. He gave me some suggestions on dressing and speaking. I handed out my resumes and went home feeling very satisfied. The following day, I received a call from a store in Royal Oak offering me a job.

    It seems that the world always gives back to you when you need it .And this time，it was a complete stranger who turned out to be a real blessing.

    In the future we might live somewhere other than Earth, like Mars. Some people ask how this will be possible. Well, Mars is in fact a lot the same as the earth. The days are almost the same as those on the earth. However, the two planets vary in temperature.

    Since there is mostly carbon dioxide on Mars, it would be quite difficult for a human to just land on it. So, special types of homes and space suits have to be designed. The space suits should be almost like the ones astronauts use now, and except that they have to be warmer so that the astronauts can survive the cold temperatures. The space suits must also be able to withstand (承受) high pressure and potentially dangerous radiation that can kill.

    The houses should be similar to our homes today with a slight difference. All of the houses and other buildings should be built inside a large dome (圆顶状物) or bubble. The domes should be made out of glass, and would also be able to prevent radiation from affecting the people inside. The domes will be connected to a machine (like plants which turn carbon dioxide into oxygen).

    With Mars' population growing, how would the people on its surface get fresh food and water? Just like humans use domes, they can also use domes to grow plants. However, the domes where the plants are grown must be built to expand. Once we upgrade the domes to a larger size then we can grow more food by cultivating (种植) more plants. To get the food or come in connect with other domes, there will be long narrow tunnels like roads that connect to each dome separating them by several doors so that the pressure in each dome can remain the same.

    On Mars, so many other things are available to us. As humans, we can have access to rare and fairly expensive metals that aren't very easy to get hold of on Earth, and a colony on Mars enhances (提高) our chances of finding these metals. So when someone here on Earth says that going to Mars is impossible, please tell them that they'll never know it until they try and they may try very soon. After all it's our future. Why not make it on Mars?

    Shukri Noor, 12, arrived in Anchorage, Alaska, one year ago. The sixth grader and her family are refugees (难民) from Kenya. "Since I didn't speak English, it was hard to communicate with others," Shukri said. "I had no friends."

    "Anchorage receives about 130 refugees every year. Most are from Somalia. The rest come from Iraq, Sudan, Cuba, Central America, and other places. Like Shukri, many of the kids feel alone. They're dealing with a lot of adjustments (适应)," Katie Bisson says. She manages to support for newcomer students in the Anchorage School District (ASD).

    At the Newcomers' Center, the ASD offers a special program for students who are new to the US. The kids spend part of each day at the center and part of the day at their neighborhood school. At the center, the students study English and other subjects.

    The main goal is to help newcomers reach the point where they attend their neighborhood schools all day. "Until then," Bisson says, "they have the support of being with kids like them, who are facing the same challenges (挑战)."

    Anchorage has a population of 300, 000.Among the ASD's 48, 000 students, 98 languages are spoken. According to Bisson, the ASD's newcomers program helps students understand a new culture so they can "start off on the right foot".

    The Newcomers' Center gives attention to middle school and high school students. For younger kids, the ASD offers a six-week summer program, which Shukri attended. "It helped me learn the language," she says. "I played sports with kids after class, and I played math games with my classmates. I feel very comfortable now."

    Why elephants rarely get cancer is a mystery that has confused scientists for decades. A study was led by researchers at Huntsman Cancer Institute (HCI) at the University of Utah and Arizona State University, including researchers from the Ringling Bros. Center for Elephant Conservation may have found the answer. According to the results, elephants have 38 additional modified copies of a gene (基因) that encodes p53, a well-defined tumor (肿瘤) suppressor, as compared to humans, who have only two. Further, elephants may have a more powerful mechanism for killing damaged cells that are at risk for becoming cancerous. In isolated elephant cells, this activity is doubled compared to healthy human cells, and five times that of cells from patients with Li-Fraumeni Syndrome, who have only one working copy of p53 and more than a 90 percent lifetime cancer risk in children and adults. The results suggest extra p53 could explain elephants' increased resistance to cancer.

    "Nature has already figured out how to prevent cancer. It's up to us to learn how different animals overcome the problem so we can adapt those strategies to prevent cancer in people," says co-senior author Joshua Schiffman, M.D., pediatric oncologist (肿瘤学家) at Huntsman Cancer Institute, University of Utah School of Medicine, and Primary Children's Hospital.

    According to Schiffman, elephants have long been considered a walking problem. Because they have 100 times as many cells as people, they should be 100 times more likely to have a cell slip into a cancerous state and cause the disease over their long life span of 50 to 70 years. And yet it's believed that elephants get cancer less often, a theory confirmed in this study. Analysis of a large database of elephant deaths estimates a cancer death rate of less than 5 percent compared to 11 to 25 percent in people.

If you're after a quick snap, if you're out and about, here are a few brilliant instant cameras to choose from.

Instax Mini 12

Made by Fujifilm, the Instax Mini series of cameras is ideal for taking quick snaps and getting high-quality credit card sized photos. The Mini also comes with built-in flash, a close-up lens (镜头) and selfie lens for taking those perfect shots.

The camera comes in a range of bright colours, including sky blue and clay white.

Polaroid Go

Famous for their cameras, Polaroid still makes instant cameras in the modern day, with a classic look. The Go comes with autofocus as well as a self-timer for effectively capturing the moment and producing quality Polaroid photographs for you to keep.

It also comes in a range of funky colors, if all black or white isn't your preference.

Instax Mini Evo

The Mini Evo combined camera and printer is a compact device with a 28mm lens that's capable of letting you review and edit photos before printing them.

Also featured is a back 2.7-inch LCD screen for viewing what you're shooting and the ability to print from your phone via Bluetooth.

Instax Mini 40

Coming just in a single but vintage black design, the Instax Mini 40 is a solid option for quick instant snaps, with a one-touch selfie mode and a more traditional looking camera, fixed with a 60mm lens.

It's also small enough to fit comfortably in your bum bag or pocket to take a quick snap if you're out and about.