E-reading and e-books are slowly conquering the world. Compared to traditional paper books, e-books in some schools and universities attract more interest because the information flow seems much easier to manage and comes in a greatly higher quantity.

    Japan is known for the reform-minded attitude towards the gadget(精巧装置)world and for the fact that it is one of the first countries that encouraged in the educational system the emailing of homework.

    The digital textbook looks like the logical step in the world of learning. It is natural but it is also completely untraditional.

    The plan of the largest publishing companies to get in line with the trend is to save a large quantity of paper and make the kids become interested in learning using a cool gadget. Many USA universities and colleges have made students be used to the procedure of downloading the courses and of course the procedure involves interactive software and also the chance of using the computer.

    The traditional education system is still unwilling when it comes to giving up books. The standard approach of information taught out of a book and Shakespeare read out of an old school novel makes studying English as traditional as it can be.

    In a world where kids would rather see the movie than read a book, the digital age has brought along a completely different flavor to reading. Bringing that flavor in school will make teaching a greener and also a completely different matter.

    One of the greatest contributions to the first Oxford English Dictionary was also one of its most unusual. In 1879, Oxford University in England asked Prof. James Murray to serve as editor for what was to be the most ambitious dictionary in the history of the English language. It would include every  English word possible and would give not only the definition but also the history of the word and quotations (引文) showing how it was used.

    This was a huge task, so Murray had to find volunteers from Britain, the United States, and the British colonies to search every newspaper, magazine, and book ever written in English. Hundreds of volunteers responded, including William Chester Minor. Dr. Minor was an American surgeon who had served in the Civil War and was now living in England. He gave his address as “Broadmoor, Crowthorne, Berkshire,” 50 miles from Oxford.

    Minor joined the army of volunteers sending words and quotations to Murray. Over the next 17 years, he became one of the staff's most valued contributors.

    But he was also a mystery. In spite of many invitations, he would always decline to visit Oxford. So in 1897, Murray finally decided to travel to Crowthorne himself. When he arrived, he found Minor locked  in a book-lined cell at the Broadmoor Asylum (精神病院) for the Criminally Insane.

    Murray and Minor became friends, sharing their love of words. Minor continued contributing to the dictionary, sending in more than 10,000 submissions in 20 years. Murray continued to visit Minor regularly, sometimes taking walks with him around the asylum grounds.

    In 1910, Minor left Broadmoor for an asylum in his native America. Murray was at the port to wave goodbye to his remarkable friend.

    Minor died in 1920, seven years before the first edition of the Oxford English Dictionary was completed. The 12 volumes defined 414,825 words, and thousands of them were contributions from a very scholarly and devoted asylum patient.

    The nervous-looking young man had waited for a few moments—outside the jeweler's before he got enough courage to enter. He was warmly greeted by a young assistant. James felt a rush of blood to his face as he explained he would be bringing in his future wife to choose a birthday present. The assistant listened carefully and told him he'd better buy a necklace. He wasn't used to buying jewellery and was a little worried about over-spending.

    After some discussion as to a reasonable price and the type, the assistant showed him dozens of necklaces and helped him to choose. At last James chose one and left the shop promising to return at five o'clock. When, half an hour later than planned, James did return to the shop with his future wife, Laura, the assistant acted as if she had never seen him before. When she was asked to show them some necklaces, she first brought out some inexpensive ones for them to choose, and then gave them the one she had prepared. A choice was soon made and they went away, satisfied. James would certainly come back to buy what he wanted.

    My father loves his garden. He planted some seeds in it. But at that time I didn't understand why working in the dirt excited him so much.

    Unfortunately, in early May, my father was seriously injured in an accident. He had to stay in bed for a while. My mother had several business trips so she couldn't take care of the garden. I didn't want my father to worry, so I said that I would take care of his garden until he recovered. I assumed that the little plants would continue to grow as long as they had water, and luckily it rained fairly often so I didn't think much about the garden.

    One Saturday morning, my father said to me, "Christine, the vegetables should be about ready to be picked. Let's have a salad today!" I went out to the garden and was upset to see that many of the lettuce leaves and carrots had been half eaten by bugs. There were hundreds of bugs all over them!

    I panicked for a moment, but then I quietly went to the nearest store to buy some vegetables.

    When I gave the salad to him, he said, "Oh, Christine, what a beautiful salad! I can't believe the carrots are this big already. You must be taking very good care of my garden." I felt a little bit guilty.

    Coming home, my mother saw the bag from the supermarket in the kitchen. I was embarrassed and I admitted, "Dad wanted a salad, but the garden was a disaster. I didn't want to disappoint him so I went to the store." She laughed but promised to help me in the garden and weeks later I was finally able to pick some.

    I carefully made a salad and took it to my father. He looked at it with a hint of a smile. "Christine the carrots are smaller in this salad, but they taste better."

    Now, I better understand how putting a lot of effort into caring for something can help you appreciate the results more, however small they maybe. Perhaps this was one of the reasons for my father's love of gardening.

    When to go: The Magic Kingdom, which was opened in 1971, was the first theme park at Walt Disney World. All Disney World theme parks are opened 365 days a year, although opening and closing time for each park changes from day to day. If you plan to make a trip to the Magic Kingdom without kids, try to visit on a school day to avoid the largest crowds. If you need to visit during a school vacation, try at least to avoid the week between Christmas and New Year's Day and the fourth of July.

    If you are not staying at a Disney World hotel, avoid visiting the Magic Kingdom on its Extra Magic Hours days, as Disney's hotel guests get into the park early on those days, and visitors who arrive at the Magic Kingdom's normal opening time have to wait for a long time.

    Before you go：Buy your Walt Disney World tickets online at Disney World's website. For advice on picking the right ticket, see our guide to Disney World tickets.

    You will also need to call in advance to make lunch or dinner reservations. Disney accepts reservations(预订)up to 180 days in advance, but you need to contact 1-407-WDW-DINE.

    When you get there: Plan to arrive at the Magic Kingdom's front gate before the park opens in the morning. Keep in mind that to reach the Magic Kingdom, you must park at Disney World's Transportation and Ticket Centre parking lot, ride a tram (有轨电车)to the TTC, then take a ferry boat across the Seven Seas Lagoon to the Magic Kingdom. It makes a fantastic approach, but takes extra time. Give yourself an extra hour in the summer and half an hour during the school year.

Have you ever heard of invisible ink? You may have seen it in movies. When light is shone on the paper which invisible ink is written on, you can read it!

As magical as this seems, the change in color is due to science. The ink is absorbing higher energy light and giving lower energy light. This reaction is an example of fluorescence (荧光) .

Light is a very broad term that describes a range of electromagnetic rays, including gamma rays, infrared light (红外光) and ultraviolet light. One part of the electromagnetic visible light is the colors that we can see with the human eye. These rays travel in curvy lines and each type of the ray is characterized by a different wave pattern. For example, Gamma rays have a shorter wavelength than infrared light. Shorter wavelength is connected with higher energy, so gamma rays also have more energy than infrared light.

Corals (珊瑚) are animals that live underwater. And the corals in the Red Sea exhibit fluorescence. Why is this happening? Scientists have shown that fluorescent objects absorb higher energy light and release lower energy light. Since the corals of the Red Sea are deep in the water where there is very little visible light, scientists theorize that these corals absorb ultraviolet light and produce visible light. They have special photo proteins, which enable them to change invisible light to visible light.

Fluorescence is not just used to create pretty colors. Corals have developed photo proteins for a biological reason. The visible light is used by algae (海藻) , which are eaten by the coral, to make food through photosynthesis (光合作用). The visual character of these photo proteins could also be used for biomedical research. They can highlight cells and cell structures under a microscope.

Isn't it amazing that a simple organism that we don't think very much of is not only grand but could also have so many potential uses in medical research!