Still seeking a destination for your weekend break? There are some places which are probably a mere walk away from your college.

King's Art Centre

    A day at the Centre could mean a visit to an exhibition of the work of one of the most interesting contemporary artists on show anywhere. This weekend tees the opening of an exhibition of four local artists.

You could attend a class teaching you how to 'learn from the masters' or get more creative with paint —- free of charge.

    The Centre also runs two life drawing classes for which there is a small fee.

The Botanic Garden

    The Garden has over 8,000 plant species; it holds the research and teaching collection of living plants for Cambridge University.

    The multi-branched Torch Aloe here is impressive. The African plant produces red flowers above blue-green leaves, and is not one to miss.

    Get to the display house to see Dionaea muscipula, a plant more commonly known as the Venus Flytrap that feeds on insects and other small animals.

    The Garden is also a place for wildlife-enthusiasts. Look for grass snakes in the lake. A snake called 'Hissing Sid' is regularly seen lying in the heat of the warm sun.

Byron's Pool

    Many stories surround Lord Byron's time as a student of Cambridge University, Arriving in 1805, he wrote a letter complaining that it was a place of "mess and drunkenness". However, it seems as though Byron did manage to pass the time pleasantly enough. I'm not just talking about the pet bear he kept in his roans. He spent a great deal of time walking in the village.

It is also said that on occasion Byron swam naked by moonlight in the lake, which is now known as Byron's Pool. A couple of miles past Grantchester in the south Cambridgeshire countryside, the pool is surrounded by beautiful circular paths around the fields. The cries of invisible birds make the trip a lovely experience and on the way home you can drop into the village for afternoon tea. If you don't trust me, then perhaps you'll take it from Virginia Woolf一—over a century after Byron, she reportedly took a trip to swim in the same pool.

    Even before my father left us, my mother had to go back to work to support our family. Once I came out of the kitchen, complaining, “Mom, I can't peel potatoes. I have only one hand.” Mom never looked up from sewing. “You get yourself into that kitchen and peel those potatoes,” she told me. “And don't ever use that as an excuse for anything again!”

    In the second grade, our teacher lined up my class on the playground and had each of us race across the monkey bars, swinging(荡秋千) from one high steel rod to the next. When it was my turn, I shook my head. Some kids behind me laughed, and I went home crying.

    That night I told Mom about it. She hugged me, and I saw her “we'll see about that” look. The next afternoon, she took me back to school. At the deserted playground, Mom looked carefully at the bars.

    “Now, pull up with your right arm,” she advised. She stood by as I struggled to lift myself with my right hand until I could hold the bar with my other elbow(肘). Day after day we practiced, and she praised me for every rung(横档) I reached. I'll never forget the next time, crossing the rungs, I looked down at the kids who were standing with their mouths open.

    One night, after a dance at my new junior high, I lay in bed sobbing. I could hear Mom come into my room. “Mom,” I said, weeping, “none of the boys would dance with me.”

    For a long time, I didn't hear anything. Then she said, “Oh, honey, someday you'll be beating those boys off with a bat.” Her voice was faint. I peeked out from my covers to see tears running down her cheeks. Then I knew how much she suffered on my behalf. She just never let me see her tears.

    Three-quarters of a million tourists flock to the primitive, white beaches every year—but this booming industry has come at a price. When foreigners left the government struggling to cope with a stream of rubbish, their answer was to turn one of these islands into a dumping ground. Clouds of sharp, poisonous smoke rising from open fires, piles of rubbish made up of plastic bottles, crisp packets and consumer junk. It's a far cry from the white sands, crystal-clear waters and gently swaying palm trees that we associate with the Maldives（马尔代夫）, the beautiful paradise island holiday destination set in the Indian Ocean.

    Of its 200 inhabited islands, which are spread across an area of 35,000 square miles, 99 are dedicated resorts. Three-quarters of a million tourists visit every year—more than double the domestic population. Of these, over 100,000 travel from the UK. The capital, Malé, is four times more densely populated than London. Given these facts, it's hardly surprising that the Maldives on which has a waste disposal problem.

    What you are seeing here is a view of the Maldives on which no honeymooners will ever fix eyes. Four miles west of Malé is the country's dumping ground, Thilafushi—or Rubbish Island as it has simply become known.

    The country dumps upwards of 330 tons of rubbish on the island every day, a figure attributed largely to the tourist industry on which the chain of islands relies. Each visitor generates 3.5 kg of waste per day.

    Now, the government of the Maldives has banned the dumping of waste on the island, which is too late, due largely to an increase in the number of waste boats “fly-tipping”（非法倾倒）directly into the sea, fed up with waiting seven hours or more to offload their cargo.

    Feifei, an 11-year-old boy from Xuzhou, Jiangsu Province, suffered from a sudden acute eye disease which has almost led to blindness. The disease was caused when he overused his eyes during the winter vacation, during which he played computer games for continuous 10 days and nights.

    Many youngsters in China nowadays are increasingly addicted to computer games and other electronic products. This is followed by a series of health problems, with the most typical case being myopia, or nearsightedness.

    According to the latest research report released by the World Health Organization (WHO),the myopia rate among Chinese teenagers ranks first in the world—70 percent of high school and college students. The rate is nearly 40 percent in primary school students, while it is only 10 percent for their peers in the United States.

    There are at least 10 million people in China with severe myopia, and they are likely to get pathological myopia（病理性的近视） in middle age. Pathological myopia can't be treated with glasses or surgery, and it is one of the biggest factors that lead to blindness, Xu Xun, an expert at Shanghai General Hospital, pointed out.

    Experts explain that two major factors lead to the high rate of myopia among Chinese people. One is high academic pressure, and the other one is excessive use of electronic devices over a long period of time. Genetics, on the other hand, are not the main reason, as only 20 percent of Chinese people had myopia in the 1960s.

    "Teenagers are now faced with severe academic pressure, which means they often study without natural light. This increases their risk of becoming nearsighted," Xu said. Experts suggest that youngsters maintain a proper balance between study and rest so as to protect their eyesight, and parents should play an active role in the process.

    The loud noise of the cars or the sound of a plane can force its way into the deepest forest, yet it's not only humans that are bothered by the noise.

    Bioacoustician Bernie Krause has been studying the effect of noise pollution on wildlife, and has come across some interesting behaviors, especially among animals that communicate by sound, like humans. Birds use sound to communicate, but in noisy places, these animals have to shout over the natural noise to be heard.

    Krause mentions a study of nightingales(夜莺) to explain what he means. The birds responded to（回应） traffic noise by singing louder and louder until they actually went beyond noise pollution standards in the city. To belt out (sing loudly) their songs, they increased their lung pressure fivefold, but scientists say that this is not dangerous for the birds themselves.

    Studies show that sudden noise can cause certain birds to leave their nests, leaving the young to their enemies. One study also showed that songbirds that nested close to busy motorways were much less productive than those that nested farther away. Mammals（哺乳动物）too are affected(影响). A recent study showed that nursing caribou（驯鹿） responded to plane noise by not producing enough milk to feed their young.

    In some cases noise pollution can actually help some animals while harming others. Toads（蟾蜍）and frogs are known to sing in union（同步发声）so that no predator (their enemies) can catch them. Krause found that when planes flew overhead and disturbed the toad's song, they lost their union, and it took them 45 minutes to get it back again. That gave their natural enemies plenty of time to find and catch individual toads by sound.

    According to Kruse, 'Not only will noise pollution bother wildlife, but it won't help our lives either.'

Accines (疫苗) may soon make their first film appearance. Led by expert Maria A. Croyle, researchers have developed a thin sheet that preserves vaccines for long periods without refrigeration. This means the carefully cooled small bottles now used to ship vaccines could potentially be replaced by lightweight films that can be mailed in an envelope and stored on a shelf.

Croyle's laboratory began developing the technology in 2007. Inspired by amber's ability to preserve the DNA of insects, the researchers set out to create their own version of the substance by mixing "a lot of sugar and a little bit of salt, much like hard candy," Croyle explains. The vaccine-containing film is administered by mouth—sweet news for many who dislike needles.

The film is tailored to suit each specific vaccine candidate and provide a protective coating. "We've learned over time that the key to really stabilizing whatever the film holds is to have it intermixed with all the components," Croyle says, adding that the process is quick and uses affordable, standard equipment. "We really wanted to come up with something that would be transferable to developing countries."

Immunization(免疫) programs depend heavily on keeping vaccines cold(2℃-8℃) as they are transported, sometimes over thousands of kilometers to far-away locations. Delivery can be difficult and costly, and transport disruptions can cause the vaccines to be ineffective.

But this new product can store live viruses, bacteria and antibodies for several months at 20℃. In a paper published in Science Advances, the scientists show that the live viruses in one vaccine were preserved in the film even after 36 months. They also find that a flu vaccine suspended in their film compares favourably with a traditional flu shot(流感预防针). "The study demonstrates early proof of concept for an exciting platform for vaccine product development," says Lisa Rohan, a pharmacologist, who was not involved in the study. She also notes that each vaccine type would need a custom formulation(配方) for future stages of development.

Finding partners to mass-produce for clinical trials is the researchers' most pressing problem, Croyle says. They are also exploring packaging methods to keep their films stable up to 40℃.

Size is a major advantage—a letter-sized sheet of the film can carry more than 500 doses(剂) of vaccine, about 1⁄900 the weight of the same amount of traditional doses. By making it easier and cheaper to ship and preserve vaccines efficiently, Croyle says, the technology could vastly improve immunization rates the world over, particularly in middle- to low- income countries.