Dick lived in England. One day in January he said to his wife, "I'm going to fly to New York next week because I've got some work there." "Where are you going to stay there?" his wife asked. "I don't know yet." Dick answered. "Please send me your address from there in a telegram (电报)," his wife said. "All right," Dick answered.

    He flew to New York on January 31st and found a nice hotel in the center of the city. He put his things in his room and then he sent his wife a telegram. He put the address of his hotel in it.

    In the evening he didn't have any work, so he went to a cinema. He came out at nine o'clock and said, "Now I'm going back to my hotel and have a nice dinner."

    He found a taxi (出租车) and the driver said, "Where do you want to go?" But Dick didn't remember the name and address of his hotel.

    "Which hotel are my things in?" he said, "And what am I going to do tonight?" But the driver of the taxi did not know. So Dick got out and went into a post office. There he sent his wife another telegram, and in it he wrote, "Please send me my address at this post office."

    If you could have one superpower, what would it be?

    Dreaming about whether you would want to read minds, see through walls, or have superhuman strength may sound silly, but it actually gets to the heart of what really matters in your life.

    Every day in our work, we are inspired by the people we meet doing extraordinary things to improve the world.

    They have a different kind of superpower that all of us possess: the power to make a difference in the lives of others.

    We're not saying that everyone needs to contribute their lives to the poor. Your lives are busy enough doing homework, playing sports, making friends, seeking after your dreams. But we do think that you can live a more powerful life when you devote some of your time and energy to something much larger than yourself. Find an issue you are interested in and learn more. Volunteer or, if you can, contribute a little money to a cause. Whatever you do, don't be a bystander. Get involved. You may have the opportunity to make your biggest difference when you're older. But why not start now?

    Our own experience working together on health, development, and energy the last twenty years has been one of the most rewarding parts of our lives. It has changed who we are and continues to fuel our optimism about how much the lives of the poorest people will improve in the years ahead.

    Mary Anning was an English fossil(化石)collector，dealer and paleontologist(古生物学家).Her fossil-hunting helped change the way people thought about the world.

    Mary was born into a poor family in England on May 21, 1799. She lived in the seaside town of Lyme Regis, in Dorset. The family had nine children. Only Mary and her brother Joseph grew up. Mary's father took his children along the beach. They picked up shells and stones to sell to visitors. Mary did not go to school much. Her family was too poor. And schools did not teach children about fossils. Mary could read and write. She taught herself. She learned about rocks and how bodies are made.

    In 1811 when Mary and Joseph were fossil hunting, Joseph saw a bone sticking out of the rock. Mary had a hammer to chip away at the rock. Very carefully she uncovered it. She found the first complete fossil of the ichthyosaur(鱼龙).

    Since then, Mary became crazy about fossil hunting. She liked to hunt on the beach after a storm. The wind, rain and waves made the rocks crumble. It was easy to spot fossils. Most days Mary went fossil hunting with her dog, Tray.

    Rich friends helped Mary by selling fossils for her. They sent her money. Scientists wrote letters and came to see her. One good friend was William Buckland, a professor at Oxford University. Mary also opened a shop to sell fossils, stones and shells. She chatted with visitors.

    Mary Anning died in1847. How evolution(进化)works was explained by Charles Darwin not long after Mary died. Her fossils had helped scientists understand how things began.

    Facebook says it is working on technology to allow us to control computers directly with our brains. It is developing "silent speech "software to allow people to type at a rate of 100 words per minute, it says. The project, in its early stages, will require new technology to detect brainwaves without needing invasive operation. "We are not talking about monitoring your random thoughts," assured Facebook's Regina Dugan. "You have many thoughts, and you choose to share some of them. We're talking about monitoring those words. A silent speech interface（界面）-one with all the speed and flexibility（灵活）of voice. "

    Ms Dugan is the company's head of Building 8, the firm's hardware research lab. The company said it intends to build both the hardware and software to achieve its goal, and has employed a team of more than 60 scientists and academics to work on the project.

    On his Facebook page, Mark Zuckerberg added, "Our brains produce enough data to stream four HD（高清）movies every second. The problem is that the best way we have to get information out into the world-speech-can only send about the same amount of data as a 1980s modem. We're working on a system that will let you type straight from your brain about five times faster than you can type on your phone today. Finally, we want to turn it into a wearable technology that can be produced in quantity. "

    Technology is going to have to get a lot more advanced before we can share a pure thought or feeling. but this is a first step. Other ideas detailed at the company's developers conference in San Jose included work to allow people to "hear" through skin. The system, comparable to Braille, uses pressure points on the skin to pass information. "One day, not so far away, it may be possible for me to think in Chinese, and you to feel it instantly in Spanish,"Ms Dugan said.

Beethoven is a giant of classical music. And the most influential, too—at least, when it comes to piano compositions. That's according to a study in the journal EP J Data Science.

If you're wondering how data analysis could determine something as abstract as cultural influence, it's worth remembering this: Music is the most mathematical of the art form, a lot of which is symbolic. The music is written in symbols that are connected in time.

Juyong Park is a theoretical physicist in South Korea. Park and his colleagues collected 900 piano compositions by 19 composers from 1700 to 1910. Then they used that mathematical quality to their advantage by dividing each composition into what they called "code words", in other words, a chord. They then compared each chord to the chord or note that came after it, which allowed them to determine how creative composers were at coming up with novel transitions.

The composer with top marks for novelty was Rachmaninoff. But when the researchers looked at those chord transitions across all 19 composers, it was Beethoven who was most heavily borrowed from—meaning at least among the composers in this analysis, his influence was the largest.

Their study comes with some drawbacks. For example, the researchers only considered piano compositions in this work, and by only studying chord transitions, so their conclusions wouldn't relate to artists who were influential in other ways like Bach or Mozart. Park explained, "It's well understood that Mozart's contribution to music comes from the musical forms that he designed. That was not very well reflected by our mathematical modeling."

As for Park, the results convinced him he has some listening to do. "Of course I listen to music. I like Rachmaninoff's music, but I have to say I have listened to Beethoven way more than Rachmaninoff. So after this work came out, I ended up buying his whole complete collection.

Anyone who has never been to China Braille Library will draw to mind various images of the place.They would wonder how the library works all the way.In fact, the library offers readers a pleasant space with several broad reading rooms on the third floor,and has 18,269 kinds of books, including 3,523 kinds of braille books, 809 kinds of braille journals, 419 kinds of books written in both braille and visible language, and 142 kinds of children's ordinary books.

The library is open to the 17 million visually impaired people in China. This library has an arrangement with China Post, under which it has manufactured a special kind of mailing bag with cards where the address of the library is printed on one side.The borrowers can make phone calls, or send WeChat messages or emails to the librarian, listing the books they are seeking. The librarian then fishes out these books, puts them into the mailing bag, fills in the address of the borrower on the other side of the card and waits for a postman to pick up the bag.Whenever the borrower finishes reading, he or she needs to put the books back into the bag, turn the address card around and put it into a postbox for the books to return to the library.

In the age of multimedia, books have taken various forms. That applies to the world of the visually impaired, too.CBL offers its readers a smart listening device that looks like an old-fashioned cellphone. Guided by a recorded voice, a user has to just press a few buttons to gain access to 20 terabytes of audiobooks stored on the CBL website.The smart listening device is part of a Digital Reading Project for the Blind launched by China Disabled Persons' Federation in 2017.

As part of the program, the government purchased 200,000 such devices and distributed them to the over 400 Braille libraries and barrier-free reading rooms nationwide for lending to the visually impaired. Now, 80 percent of them are still in use, which means more than 160,000 visually impaired people are benefiting from it.