Ireland，Japan，Chinascientists share the 2015 Nobel Prize for medicine．WilliamCampbell，Satoshi Omuraand Tu Youyou jointly won the prize for their work against diseases，theaward-giving body said on Monday．

Tu Youyou, a scientist at the China Academy of Chinese MedicalSciences, has no postgraduate degree. She has never studied or done researchabroad. She is neither a member of the Chi­nese Academy of Sciences nor theChinese Academy of Engineering. However, the 81-year-old phar­macologist hasbecome the first scientist on the Chinese mainland to win a Lasker Award, themedical prize of the Albert and Mary Lasker Foundation.

The Lasker Awards have existed since 1945. Tu was presented the2011 Lasker Clinical Medical Research Award on September 23. She discovered adrug called artemisinin . The drug is now widely used against malaria .

Tu and her colleagues joined a government project to find a newmalaria drug in the late 1960s during the "cultural revolution"(1966-76).  They made 380 herbal extractsfrom 200 potential recipes. The recipes came from traditional Chinese medicalbooks. The team then tested them on malaria-infected mice.  Finally Tu became interested in an extract ofthe plant qinghao, or sweet wormwood .

According to an ancient Chinese medicine book, qinghao was onceused to treat malaria. However, the extract they made in the lab didn't workwell. Maybe, thought Tu, the effective ingredient in qinghao was destroyed byhigh temperatures. Therefore, Tu tried to make the extract with an ether whichhas a much lower boiling point than water.

In 1971, after more than 190 failures, Tu finally got an extractthat was 100 percent effective against the malaria para­sites .The extract wascalled qinghaosu, later renamed artemisinin.

According to a statement on the Lasker Foundation website,during the past four decades, Tu's drug has saved millions of lives. It isespecially important for children in the poorest and least developed parts ofthe world. However, not many people knew of the scientist until she won theLasker Award this month.

Lasker Awards are known as "America's Nobels" for thereason that in the last two decades, 28 Lasker Prize winners have gone on toreceive the Nobel Prize, and 80 since 1945, according to Xinhua News Agency.

" The discovery of artemisinin is a gift to mankind fromtraditional Chinese medicine," Tu said when she received the a-ward."Continuous exploration and development of traditional medicine will,without doubt, bring more medicines to the world.

    Welcome to the Old Royal Naval College (ORNC), one of London's most famous landmarks. It is open daily and is a wonderful place to visit — whether you have an hour or a day.

    The buildings and grounds of the ORNC were originally designed as a refuge(避难所)for old and injured sailors in the 1690s. Later the site became a training college for officers in the Royal Navy. Today they are free to visit and host an exciting range of events all year round.

Painted Hall

    View the impressive Painted Hall, known as the greatest piece of decorative painting in England. Sir James Thornhill spent 19 years painting it celebrating the royal family and maritime(海上的) power. Discover more interesting history through our daily talks and family activities.

Chapel(小教堂)

    Redecorated by James“Athenian”Stuart after a fire in 1779, the Chapel reflects Stuart's Greek influences, and is still an active place to show respect and love for God. Besides, it is a perfect place for concerts and recitals(演奏会).

Discover Greenwich

    Explore over 500 years of history and architecture at the Discover Greenwich Visitor Centre. There is an impressive central model of Maritime Greenwich World Heritage (遗产)Site.

Opening times

    Painted Hall, Chapel and Discover Greenwich Visitor Centre open from 10:00 to 17:00, Mon to Sun. (Chapel opens at 12:00 on Sun following service).

Grounds open daily 08:00-18:00.

    After a year of examining many studies concerning whether homework is effective, NYC P. S. Elementary School decided that math worksheets and essay assignments were actually a waste of time. In February, Principal Jane Hsu sent a letter to parents stating that the Pre-K(学前班) through fifth grade students wouldn't be given any traditional homework to encourage kids to free time for reading, playing outside, or doing activities they enjoy.

    “The negative effects of homework have been well established.” Hsu wrote in a note to parents. “They include, children's frustration and exhaustion, lack of time for other activities and family time and, sadly for many, loss of interest in learning.”

    Some parents, however, disagree with the policy change, believing that a lack of focus will cause children to fall behind. Homework has been part of education from the beginning, and has increased in amount in recent years.

    Hsu's advice that children should read and spend time with their families has upset some parents to the point of considering pulling their children out of the school. This group feels that homework gives children a goal to work toward. Others feel so strongly about the importance of homework that they have begun giving their own homework to their children.

    An Australian Childhood Foundation survey finds that 71% of Australian parents feel they don't spend enough quality time with their children mainly because of the time spent running the household or the time spent helping with homework. Education experts in Australia are saying that parents should stop helping. Doing so will give kids more independence, give parents more free time, and help reduce the number of arguments caused by homework in the family.

    While some research suggests that homework has little academic benefit for elementary students, other researches show homework can help kids develop independence, and confidence. It can also contribute to a sense of belonging or control over their lives. When parents try to help their children with homework, the assistance can take away that feeling and can also make working parents more tired.

    Crown shyness(树冠羞避) is a mysterious natural phenomenon in which the crowns of some tree species do not touch each other, but get separated by a gap clearly visible from ground level. The effect usually occurs between trees of the same species, but has also been observed between trees of different species.

    There are many theories going around, most of which make sense, but no one has been able to prove without the shadow of a doubt why some trees avoid touching each other.

    In his 1955 book Growth Habits of the Eucalypts, Australian forester M.R. Jacobs writes that the growing tips of the trees are sensitive to abrasion(擦伤), which results in crown shyness phenomenon. This theory was also supported by Dr. Miguel Franco. Some experiments have shown that if trees displaying crown shyness are artificially prevented from swinging in the wind and touching each other, they gradually fill up the gaps between them.

    But while the above theory is arguably the most widespread, it's certainly not the only one. Some scientists have suggested that crown shyness is a mechanism to stop the spreading of leaf-eating insects. These pests have been known to work together and create structures that extend up to 10 cm off of tree branches in order to reach other plants, so the gaps are the trees' natural defense method.

    One Malaysian scholar studied many trees, but found no traces of abrasions, despite their clear crown shyness. Instead, he suggests that the growing tips of the trees were sensitive to light levels and stopped growing when they got too close to other trees. Plants are able to sense how close they are to other plants and in order to get more light, they give off some chemical element to stop other trees from growing too close.

    Whatever the reason, one thing is for sure: plants are more intelligent than people used to think.

    Scientists can figure out a movie's emotional tone from the gasps(喘气) of its audience. These gases could point the way to a subtle(微妙的，精细的) form of human communication, a new study suggests.

    "When you see a movie, you can hear the music and see the pictures. However, you don't realize here are chemical signals in the air. And they, too, could be affecting you, says Williams, who led the study. As an atmospheric chemist, he studies the chemical makeup of the air around us.

    Williams started out measuring the air in a soccer stadium. He noticed that levels of carbon dioxide and other gases changed wildly whenever the crowd cheered. That got him wondering -- Could the gases people breathe out be influenced by emotions?

    To find out, he went to the movies.

    Williams and his coworkers measured air samples collected over six weeks in two movie theaters. Overall, 9,500 movie goers watched 16 films. They included a mix of comedy, romance, action and horror films. Among them were The Hunger Games, Catching Fire, Carrie, and Walking with Dinosaurs. The researchers gave scenes from the movies such labels as "suspense(悬疑)", "laughter" and "crying". Then they looked for hundreds of chemicals in the air that showed up as people were watching particular movie scenes.

    And certain scenes had distinct chemical "fingerprints". Scenes that had people laughing or on the edge of their seats were especially distinctive. During screenings of The Hunger Games, levels of carbon dioxide and isoprene got to the highest at two suspenseful moments. Because isoprene is related to muscle movement, the researchers think tense movie moments likely led to its spikes(尖峰). Williams and his colleagues think the increase in carbon dioxide was due to the viewers' increased pulse and breathing rates.

    Scientists need more data to make stronger links between human emotions and what's in their breath. But Williams can see potential practical uses. Companies, for instance, could quickly measure the air during tests to see how people feel about new products. He pictures future studies recording other body variables(变数) as well. These might include heart rate and body temperature, for instance. "It's something to find out."

Ida Nelson and her sister were relaxing and enjoying themselves in the sauna (桑拿室) when she heard a series of long low sounds from a small airplane circling the nearby airport.

It was 11:30 at night in the Alaskan village of Igiugig, population 70, and, as she told the reporter, "Any time a plane flies over that late, you know something is wrong."

Nelson and her sister leaped out of the sauna, ran to the window, and saw the problem: The airport's runway lights were out.

Nelson threw on some clothes, jumped into her ATV, and floored it to the airport, where she found a local pilot trying to turn on the lights manually.

"Normally, if you push the button 10 or 15 times, the lights will just light up," Nelson told KTOO out of Juneau. Not this time. Meanwhile, she and the pilot learned of the plane's urgent mission: It was a medevac (医疗救护直升机), there to transport a seriously ill local girl to the nearest hospital, 280 miles away in Anchorage.

Nelson had a plan. Driving her ATV to the end of the runway, she shone her headlights for the plane to follow. Great idea, but it wasn't enough. More light was needed, so a neighbor called nearly every home in the village—32 of them.

Within 20 minutes, 20 vehicles arrived at the airport, many of the drivers still in pajamas (睡衣). Following directions from the medevac pilot, the cars lined up on one side of the runway.

The medevac made its final approach and, guided by the headlights, landed safely. The young patient was loaded onto the aircraft, and the plane immediately took off again. Her illness was never publicly revealed, but she has since been released from the hospital.

In a world filled with uncertainty, the little community's positive activism was a big deal. Not so much for Nelson. As she told the reporter, in Igiugig, coming together "is kind of a normal deal."