As a boy, Charles Robert Darwin(达尔文) collected anything that caught his interest: insects, coins and interesting stones. He was not very clever, but Darwin was good at doing the things that interested him.

    His father was a doctor, so Darwin was sent to Edinburgh to study medicine, and was planned to follow a medical career. But Charles found the lectures boring. Then his father sent him to Cambridge University to study to be a priest. While at Cambridge, Darwin's interest in zoology and geography grew. Later he got a letter from Robert FitzRoy who was planning to make a voyage around the world on a ship, the Beagle. He wanted a naturalist to join the ship, and Darwin was recommended(推荐). That voyage was the start of Darwin's great life.

    As the Beagle sailed around the world, Darwin began to wonder how life had developed on earth. He began to observe everything. After he was home, he set to work, getting his collection in order. His first great work The Zoology of the Beagle was well received, but he was slow to make public his ideas on the origin of life.

    Later Darwin and Wallace, another naturalist who had the same opinions as Darwin, produced a paper together. Darwin's great book “On the Origin of Species by Means of Natural Selection”(《物种起源》) appeared. It attracted a storm. People thought that Darwin was saying they were descended from monkeys. What a shameful idea! Although most scientists agreed that Darwin was right, the Church was still so strong that Darwin never received any honors for his work.

    Afterwards, he published another great work, The Descent of Man. His health grew worse, but he still worked. “When I have to give up observation, I shall die,” he said. He was still working on 17, April, 1882. He was dead two days later.

    More than 30,000 people went to the White House on Monday for the 136th Easter Egg Roll (复活节滚彩蛋). President Barack Obama and First Lady Michelle Obama held the event by inviting thousands of kids to color and look for eggs. The theme(主题) of the day was “Hop Into Healthy, Swing Into Shape.” It was part of the First Lady's “Let's Move!” program to reduce obesity rates (肥胖率) among American kids. Mrs. Obama spoke to young reporters about her goal(目标) to get children to eat right and keep moving.

    “We are working to make sure that kids born today grow up healthy, learn how to have balanced meals, and get more physical activity into their lives,” she said.

    Mrs. Obama said she wants children across the nation to understand that "exercise isn't just hard work, it's play. If you're running around with your dog, you're getting exercise. If you walk up the stairs, that's exercise, But if you're sitting in front of the TV or on a computer game, you're not exercising.”

    The First Lady said that for kids who have balanced meals most of the time, having a special snack, like chocolate, will not hurt." And if you are active, you can splurge (挥霍) a little more," she said. Mrs. Obama's favorite "splurge food" is French fries. But she balances her splurging by exercising almost every day. She loves to play tennis and she practices yoga.

    “A lot of kids look up to(敬仰) athletes, and I think it's important for athletes to share their good habits,” Mrs. Obama said. "Kids aren't just going to wake up and be LeBron James. He's practicing and eating right and working out and training. Our athletes can be really good messengers to kids who look up to them--they can say to kids, 'If you really want to be like me, then you really do need to eat your vegetables.'”

    It warmed my heart today to walk into the Thirsty Camel downtown in the Thanksgiving Day, for a quick lunch before a haircut and library trip. Ilan, a food shop owner, said that he was refusing to take money today because it was Buy Nothing Day. To increase awareness(意识) of the stranger's over-spending nature of our society, Ilan suggested a trade for food today. He simply asked that you offer something of equal personal value for the meal you received.

    At first I was really uncomfortable, wondering if it would be fair to exchange a yet to be determined “I Owe You” (IOU) for food? What could I give him of equal value? After all, his food is the best in the town!

    We ended up writing our IOU's with promises of a book, some paintings and the offer of work in a variety of ways if he needs it.

    I think the idea isn't that the trade is “equal” so much as the importance of the kind of transaction. We put thought into our offer and we had an even greater understanding for the meals we ate.

    We don't buy a lot, especially at this upcoming time of year. We don't give gifts at all in fact. The holiday time is spent enjoying each other's company and doing things together with family and friends. This is what seems most sensible.

    Ilan is a good person. We are all lucky to have someone like this in our community.

    Microsoft has developed a new smart phone app that interprets eye signals and translates them into letters, allowing people with motor neurone disease to communicate with others from a phone.

    The GazeSpeak app combines a smartphone's camera with artificial intelligence to recognize eye movements in real time and convert(改变) them into letters, words and sentences.

    For people suffering from ALS（渐冻症）, also known as motor neurone disease, eye movement can be the only way they are able to communicate.

    “Current eye-tracking input systems for people with ALS or other motor impairments are expensive, not robust under sunlight, and require frequent re-calibration and substantial, relatively immobile setups,” said Xiaoyi Zhang, a researcher at Microsoft who developed the technology.

    “To mitigate the drawbacks…we created GazeSpeak, an eye-gesture communication system that runs on a smartphone, and is designed to be low-cost, robust, portable and easy to learn.”

    The app is used by the listener by pointing their smartphone at the speaker. A chart that can be stuck to the back of the smartphone is then used by the speaker to determine which eye movements to make in order to communicate.

    The sticker shows four grids(方格) of letters, which each correspond to a different eye movement. By looking up, down, left or right, the speaker selects which grids the letters they want belong to. The artificial intelligence algorithm（程序） is then able to predict the word or sentence they are trying to say.

    If you're living in or visiting New York, take a few hours to visit one of these places to ice skate during your time in New York City.

    Bank of America Winter Village at Bryant Park

    The free rink in Manhattan's Bryant Park first opened in 2005 At 17,000 square feet, it is about half the size of the Wollman Rink in Central Park and twice as big as the rink at Rockefeller Center.

    As Manhattan's only free skating rink, and centrally located at that, it tends to be mobbed(闱聚) with waits up to 2 hours on weekend days.

    Sky Rink at Chelsea Piers

    Manhattan's only year-round skating rink is a delight that's been around since 1965 It's large, indoors, and has few lines, and courteous staff It's also, amazingly, open 24 hours a day In the winter it sometimes gets so cold that the ice cracks, but at least they fix it!

    Prices for skating admission is $11 and skate rental $6.

    Riverbank Stile Park Ice Skating Rink

    This sizeable outdoor rink is open to the public Friday through Sunday, and has a root to prevent December snows and April rain .And since Riverbank Stale Park overlooks the Hudson, you'll have nice views of the river and the George Washington Bridge as a backdrop.

    Admission is S5 for adults, children S3 Skate rental is $6 The Ice Kink at Rockefeller Center Ice skating at Rockefeller Center is a truly unique New York holiday staple(重要内容). It is the most sumptuous(豪华的)getting for skating Since opening on Christmas Day back in 1936 this skating rink has been an institution at the Rockefeller.

    Admission is $25—$32 for adults, children up to 12 years S15, skate retual $12.