Dreams can be familiar and strange, fantastical or boring, but some dreams might be connected to the mental processes that help us learn. No one knows for certain why people dream, but some dreams might be connected to the mental processes that help us learn. In a recent study, scientists found a connection between nap-time dreams and better memory in people who were learning a new skill.

    In the study, 99 college students between the ages of 18 and 30 each spent an hour on a computer, trying to get through a virtual maze(迷宫). The maze was difficult, and the study participants had to start in a different place each time they tried — making it even more difficult. They were also told to find a particular picture of a tree and remember where it was.

    For the first 90 minutes of a five-hour break, half of the participants stayed awake and half were told to take a short nap. Participants who stayed awake were asked to describe their thoughts. Participants who took a nap were asked about their dream after sleep — and they were awakened within a minute of sleep to describe their dreams.

    Stickgold, a neuroscientist (神经科学家), to know what people were dreaming about when their eyes weren't moving, during sleep.

    Four of the 50 people who slept said their dreams were connected to the maze. Some dreamed about the music that had been playing when they were working; others said they dreamed about seeing people in the maze. When these four people tried the computer maze again, they were able to find the tree faster than before their naps.

    Stickgold suggests the dream itself doesn't help a person learn — it's the other way around. He suspects that the dream was caused by the brain processes associated with learning.

    All four of the people who dreamed about the task had done poorly the first time, which makes Stickgold wonder if the dreams show up when a person finds a new task particularly difficult. People who had other dreams, or people who didn't take a nap, didn't show the same improvement.

    There are an extremely large number of ants worldwide. Each individual (个体的) ant hardly weigh anything, but put together they weigh roughly the same as all of mankind. They also live nearly everywhere, except on frozen mountain tops and around the poles. For animals their size, ants have been astonishingly successful, largely due to their wonderful social behavior.

    In colonies (群体) that range in size from a few hundred to tens of millions, they organize their lives with a clear division of labor. Even more amazing is how they achieve this level of organization. Where we use sound and sight to communicate, ants depend primarily on pheromone (外激素), chemicals sent out by individuals and smelled or tasted by fellow members of their colony. When an ant finds food, it produces a pheromone that will lead others straight to where the food is. When an individual ant comes under attack or is dying, it sends out an alarm pheromone to warn the colony to prepare for a conflict as a defense unit.

    In fact, when it comes to the art of war, ants have no equal. They are completely fearless and will readily take on a creature much larger than themselves, attacking in large groups and overcoming their target. Such is their devotion to the common good of the colony that not only soldier ants but also worker ants will sacrifice their lives to help defeat an enemy.

    Behaving in this selfless and devoted manner, these little creatures have survived on Earth, for more than 140 million years, far longer than dinosaurs. Because they think as one, they have a collective (集体的) intelligence greater than you would expect from its individual parts.

    A day in the life of 18-year-old David Lanster is full if typical teenage stuff: school, baseball practice and homework. And then he starts cooking. “Some nights I'm up until 1:00 a.m. making pies, or even later if we're cooking beef,” said the student at Ransom Everglades High School in Florida, US.

    For the past year, Lanster and Kelly Moran, his classmate, have been hosting fancy dinner parties at Lanster's parents' home. Their meals have 17 courses and are all made by them. Their guests used to give them gifts to thank them until the pair decided to do something nice for charity（慈善）. “We got some really great Miami Heat tickets, a nice watch, and many kitchen gadgets（小器具）,” Lanster said. “But we wanted to make this something positive for people other than us.”

    Lanster and Moran focused on Common Threads, a charity that aims to teach kids in poor communities to cook and make healthy eating choices. The young cooks ask their guests to give however much they want as payment for their meals. It all goes to Common Threads because Lanster's parents cover their food costs. After their last 12-person event, Lanster and Moran gave $1,600 to the charity.

    Now, they're taking their show out of the kitchen and on the road. They have started to organize private dinner parties with a similar model: the host pays for the ingredients, and the guests make a donation to a charity of their choice.

    Without formal training, Lanster said he had been interested in cooking since he helped his mom in the kitchen when he was very young. He learned how to cook by reading cookbooks and watching TV programs. Outside the kitchen, the two are busy preparing their college applications. Neither of them is sure what they will do in the future, but they're promised their parents that they will leave professional cooking alone until they finish school.

    As a Fulbright（富布莱特法案基金）scholar at Yale, I wanted very much to get some individual help from some famous professors, but their office-hours were only once a week and there were always students waiting outside. At first, I was too polite to get their help. Then I realized that Chinese politeness does not work in this society. I needed to be aggressive to get what I wanted. I also noticed that Chinese students or Asian students were very polite in class while American students often interrupted the professor, asking questions and dominating the discussion. The Chinese students were not as aggressive as American students.

    I was impressed by the role of the professor in the class. The professor didn't act as an authority, giving final conclusions, but as a researcher looking for answers to questions together with the students. One linguistic feature of his interacting with his students was that he used many modal verbs-far more than I did in Beiwai. When answering questions, he usually said: “this is my personal opinion and it could be wrong. It would be a good idea if you could read the book I mentioned the other day.” Or,“ You may find the book I recommended helpful.” Or,“You could be right, but you might find this point of view also interesting.” When making comments on students' performances, the professor usually said:” It might have been much clearer if you had taken in some of the ideas we discussed earlier this semester.”

    In China, authorities are always supposed to give wise decisions and correct directions. Therefore students always expect the professor to give an answer to the question. I still remember how annoyed they were when foreign teachers did not provide such an answer. Their expectations from authorities are much higher than those of American students. Once the Chinese students got the answer, they were sure about it. That is why they make far more certain statement than American students. That is why Chinese students find it difficult to use modal verbs because the function of modal verbs is to provide room for negotiation and different ideas.

    This is my origin story: when I was a teenager I wrote terrible poetry. Like really bad. Worse than yours, I bet. A lot of it about how every little thing reminds me that we're all going to die one day. I wrote collections and collections of these poems, thinking one day I would have my moment. I named one collection, ironically, The Eternal Optimist.

    In 1996, I found an advert for the International Poetry Competition. I was 16 years old and ready for my poetry to be released on the world. Not only was it a competition with a cash prize, but it was poetry, which I wrote, and international. This was my ticket to becoming world-famous. I submitted a poem called Trail of Thought. If you ever wrote bad poetry as a teenager, you'll have written something like it. In the poem, I went for a walk and noticed small poignant(辛酸的) things in nature, and each one reminded me that we were all going to die one day.

    I filled out the form, printed off the poem and sent it off, fingers crossed. I waited to hear back I carried on writing, I probably finished another collection. Then I got a letter from the International Society of Poets. I opened the envelope carefully, just in case a prize-winning cheque fell out I hadn't won. But, they liked my poem enough to include it in their anthology(诗选), Awaken to a Dream. I closed my eyes, I wanted to scream with happiness. I was going to be a published poet.

    All I had to do in order to be published was accept the terms and pay £ 45（plus £ 5 p & p）for an anthology. If I didn't buy a copy of the anthology, my poem wouldn't be included. I had to convince my mum, who thought my writing a meaningless pastime, to part with £ 50. She even asked the question: “Why do you have to pay to be in this book?” Nevertheless, she wrote a cheque for £ 50 and I returned it with my letter of agreement.

    I was 16 and about to be a published poet. This was what it had all been about. This is what it had all been leading to. The months waiting for the anthology were a torture. I hit some sort of writer's block, I couldn't write anything. It was almost as if, now I was published, it mattered more what I committed to page and I didn't want to write anything down unless it was good enough to go into an anthology like Awaken to a Dream.

    The book arrived through the post. Here it was. The first thing I had ever been published in a book called Awaken to a Dream, featuring a blistering take on the mundanity(世俗) of mortality by yours truly. I opened the package to find a book, containing my work. The first thing that struck me about the book was that it was bigger than A4. And it was thick. And on each page was a poem, next to another poem, next to another. The type was small and the paper thin enough to trace with. With three or four poems per page and more than 700 pages, I had a sinking realization. This was a scam, an illegal trick for making money.

    If each poem had cost the author £ 45, they were sitting on a fortune. I felt ashamed. Everyone who had submitted something to the International Poetry Competition had fallen for the same hustle（忙碌）as me. I couldn't bring myself to show my mum. And she never asked to see it. Perhaps she thought if the price of me learning a lesson was £50 we didn't really have, then so be it.

    But that stayed with me, that moment of realization. Because I determined to keep writing and ensure that my precious words always found a home worthy of them. Or at least that's how, more than 20 years later, I justify falling for a scam. Because your first time being published should be special, and if I don't convince myself that there was a reason for my first poem being in a vanity(无价值) book, then what good was it in the first place? And, strangely, someone is selling this book on Amazon at the moment. I wonder how many other writers who went on to do more stuff are in there.

    Mr. Lee was in bed and was trying to go to sleep when he heard the bell ring. He turned on the light and looked at his clock. It was twelve o'clock. "Who can it be at this time of night?" He thought. He decided to go and find out. So he got of bed, put on his dressing gown (浴袍) and went to the door. When he opened the door, there was nobody there. "That is very strange." Then he went back to his bedroom, took off his dressing gown, got back into bed ,turned off the light and tried to go to sleep.

    A few minutes later he heard the bell again. Mr. Lee jumped out of bed very quickly and rushed to the door. He opened it, but again he found no one there. He closed the door and tried not to feel angry. Then he saw a piece of paper on the floor. He picked it up. There were some words on it : "It is now after midnight(午夜), so it is April Fool's Day (愚人节). April fool to you!"

    "Oh, it was the English boy next door!" Mr. Lee exclaimed (惊叫) and almost smiled. He went back to bed and feel asleep at once. The bell did not ring again.