LONDON—Terror struck in the heart of London on Thursday as explosions ripped through three subway trains and blasted(炸开)the roof off a crowded red double-decker bus. At least 37 people were killed and more than 700 wounded in the deadliest attack on the city since the blitz(闪电战)in World War II.

British Prime Minister Tony Blair blamed Islamic extremists and said the bombings were designed to coincide with the opening in Scotland of a G-8 summit of the world's most powerful leaders. Foreign Secretary Jack Straw said the bombings—which came the day after London won the bid to host the 2012 Olympics— have the “hallmarks(特点)of an al-Qaida-related attack”.

    Trapped passengers in the Underground railway threw themselves on the floor, some sobbing. As subway cars quickly filled with smoke, people used their umbrellas try to break the windows so that they could get air. Passengers emerged from the Underground covered with blood and soot(黑烟). On the street, in a light rain, buses ferried the wounded, and doctors used a hotel as a hospital.

     “I didn't hear anything, just a flash of light, people screaming, no thoughts of what it was. I just had to get out of the train,” said subway passenger Chris Randall, 28, who was hospitalized with cuts and burns to the face, the legs and hands.

     “It was chaos(混乱),” said Gary Lewis, 32, evacuated(撤离)from a subway train at King's Cross station. “The one haunting(萦绕)image was someone whose face was totally black( with soot) and pouring with blood.”

    Police said there had been no warning and that the blasts at three subway stations went off within 26 minutes, starting at 8:51 a.m. in an Underground train just outside the financial district. Authorities initially blames a power failure but realized it was a terror attack after the bus bombing near the British Museum at 9:47 a.m.—less than an hour after the first explosion.

    Reach for the stars at the Euro Space Center. Find out everything you need to know about space — from the origins (起源) of the universe to the future space exploration plans. Light, sound and special effects help to bring your space journey to life. Throughout your tour, our specially trained guides will answer your questions and provide you with any information you require.

    Begin your tour with our exhibition about the planets, then move on to the Space Laboratory and see some of the experiments carried out in space. Visit our international space station, where you can climb into our full-scale Space Shuttle model and experience life on board as an astronaut.

    You will know all about space by now and to help you further, our Space Center astronaut will tell you about how young people train as astronauts in our own training school. Finally, you can watch our amazing Space Show in our IMAX cinema, which will help you understand everything you have learned during your visit better.

    Outside we have an outdoor exhibition including a giant solar system, full-size rocket models and outdoor games. Don't worry if it rains — much of this is under cover.

    After that, why not visit our restaurant Resto Space for food and drink on a space theme? And don't forget our Space Shop, offering you a lot of gifts to take home.

    The Euro Space Center is open every day during school holidays, and also during other times except Mondays. Opening times are 10:00-5:00. For entrance fees, call our booking service on + 32-61-650133. Or you can email us for up-to-date entry information at info@eurospacecenter.be.

    Having experienced a shocking electrical accident, which caused him to become both blind and deaf, James Franco's world became completely dark and quiet for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family, especially his wife, did their best to tend and comfort him and finally he regained the will to live.

    One hot summer afternoon, he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet, but he was struck by lightning. Witnesses (目击者) thought he was dead but he woke up 20 minutes later, lying face down in muddy water. He was trembling badly, but when he opened his eyes, he could hardly believe what he saw: a tree and a muddy road. When Mrs. Franco came running up to him, shouting to their neighbors to call for help, he could see her and hear her voice for the first time in nearly ten years.

    The news of James regaining his sight and hearing quickly spread and many doctors came to examine him. Most of them said that he regained his sight and hearing from the shock he got from lightning. However, none of them could give a compelling answer as to why this should happen. The only reasonable explanation given by one doctor was that, since James lost his sight and hearing as a result of a sudden shock, perhaps, the only way for him to regain them was by another sudden shock.

    London's transport services offer you a special experience of the city. Here's a round-up of the transport choices available to you.

    London Underground

    There are 11 colour-coded Underground lines. Services run regularly from around 05:00 to 00:30 (Sunday 07:30 to 23:30) on most routes.

Visit tfl.gov.uk/tube for more information.

    Tip:

    Always stand on the right when using the escalators (电动扶梯) at Tube stations. It can get hot and busy on the Tube during peak (高峰) travel times, so you may prefer to travel outside these hours.

    Buses

    A cheap and easy way to travel around London. They generally run from 05:00 to 00:30. Night buses operate on many major routes from around midnight to 05:00, and some operate a 24-hour service.

    It is not possible to pay for your London bus fare in cash. Instead you can pay with a Visitor Oyster card, Oyster card, Travelcard or UK-issued contactless payment card. A single bus journey is £1.50 with an Oyster card or UK-issued contactless payment card.

    To help you get home, if you don't have enough credit on your Oyster card, you will be able to make one more bus journey.

    After this you will need to top up the credit on your card before you use it again. If your contactless payment card has been issued outside the UK, please check tfl.gov.uk/contactless before you use your card to travel on our bus services. For any international transaction fees (手续费) that may apply, please check with your card issuer.

    For more information visit tfl.gov.uk/buses.

    Tip:

    Some bus routes are especially good for sightseeing — try routes 9, 14, 15 and 22. The New Routemaster bus featured in the James Bond film Skyfall and runs on routes 9, 11, 24, 38 and 390.

    If you run out of credit on your Visitor Oyster card, it's easy to add more at:

    Touchscreen ticket machines in Tube, DLR, London Overground and some National Rail stations.

    Around 4,000 Oyster Ticket Stops cross London (Find your nearest one at ticketstoplocator.tfl.gov.uk).

    Travel & Visitor Information Centres.

    London Overground station ticket offices.

    Humans make mistakes. Even surgeons with years of experience are not infallible. But what if these doctors could pool their knowledge and experience together and create a surgical standard of care, to be carried out by machines?

    That's the idea behind surgical robots, which may soon perform most surgeries, from sewing up tiny wounds to performing heart procedures. Many of these operations are, in fact, already completed with the assistance of robots. But a recent test suggests that robots in the operating room may soon go a step further, performing on soft tissue completely on their own, from start to finish.

    The Smart Tissue Autonomous Robot（STAR）, successfully completed surgeries on pigs. "We're the first group to develop autonomous robotic surgery with soft-tissue surgery, and when compared to standard operation, it's better, "says Peter Kim, professor of surgery. "The idea is not to replace surgeons；it will make the surgeons better and make the procedures safer. "

    A recent Mayo Clinic study found that major surgical errors-including operating on the wrong site or side of the body, or even leaving tools or objects inside the patient-occur every one out of 22, 000 procedures. That's rare, but robots like STAR would aim to lower the number even further.

    In the da Vinci surgical system, surgeons place their arms inside instruments and use their hands to control the movement of robotic tools on the operating table from afar. The robot's every major move is controlled by surgeons, and thus its results may vary based on the surgeon's training or experience.

    STAR, on the other hand, is entirely autonomous. It's not only able to work on its own and perform surgeries with a more flexible "hand", but it's able to react to the unexpected incidents. Cutting into hard tissue like bones is one thing, but operating on moving soft tissue is far more complex. STAR reacts to a changing environment, similar to how self-driving cars are programmed to not only drive on the highway, but also react to another driver making a mistake and getting in your way.

Public libraries are an excellent resource for research, literacy(读写能力)education, and reading-centered events. Most towns have one or share library services with other towns through a mobile library, and the use of a public library is free to people who are willing to apply for a library card.

There are several primary sources of library funding(资金)， starting with national funds which are distributed to states or provinces. These regions send the funds on to public libraries. Local governments also play an important role in providing funding for libraries, and most librarians apply for grants(拨款). Finally, private donations help to maintain libraries—most libraries have an association of Friends of the Library which organizes fund-raising sales and pays annual dues to help maintain the library.

Grants and private donations can also be used to provide a large amount of funding for public libraries, and some large libraries maintain a separate staff to increase the amount of funding that they can obtain through these sources. Grants include technology grants which allow libraries to install and upgrade computer systems, grants which focus on a particular topic such as science, fiction, children's books, or local history, and education grants which support locally-based community efforts such as after-school reading programs. Many private donors are pleased to support their local public libraries by donating funds or including some library in their wills, and libraries reward their donors with treats like after-hours visits or privileged access to special collections.

By combining multiple resources, creative librarians can keep their libraries useful, informative, and fun for browsers. When it comes to supporting public libraries, every little bit counts: if you cannot afford to donate to a local library, think about volunteering time to help shelve, lead after-school programs, or organize fund raisers. Being active with your public library is a very important way to contribute to your local community.