Many of us remember being in awe(敬畏) when we saw cloned dinosaurs running wild in the film Jurassic Park. And the idea of using technology to revive(恢复) extinct species has long fascinated not only writers and directors, but scientists as well.

    According to The Telegraph, woolly mammoths(长毛猛犸象), which featured in the popular Ice Age animated movie series, “may walk the earth once more” now that scientists have taken another step toward realizing a long-held dream—recreating their DNA.

    Mammoths became extinct around 10,000 years ago. However, since the discovery of near-perfect preserved remains in Arctic permafrost(北极冻土带) in May 2013, a variety of research studies have been carried out since.

    Geneticists from Harvard University analyzed DNA from the remains, looking for genes which separated mammoths from elephants, such as hairiness and ear size. They then used the results to reproduce exact copies of 14 mammoth genes. “It is the first time that mammoth genes have been alive—although so far it has only been done in the lab,” George Church, lead researcher of the project, told the Sunday Times.

    Church then used a new technique which allows scientists to edit DNA carefully, replacing sections of elephant DNA with the mammoth genes. So “we now have functioning elephant cells with mammoth DNA in them,” he said.

    However, Church ruled out the possibility of bringing the mammoths back to life via cloning from frozen remains. He said he “preferred to focus on rebuilding the full mammoth genome(基因组) by analyzing DNA from preserved remains and putting it into the cells of its closest living relative – the Asian elephant,” reported The Telegraph.

    Church argued that the return of the woolly mammoth—or rather, the return of something very similar—could help bring back fragile(脆弱的) ecosystems. However, some scientists believe that bringing back the mammoth would be unethical.

    Professor Alex Greenwood, an expert on ancient DNA, said: “We may face the extinction of African and Asian elephants. Why bring back another elephant from extinction when we cannot even keep the ones that are not extinct around?” he told the Sunday Times. “What is the message? We can be as irresponsible with the environment as we want. Then we'll just clone things back?”

    “Money would be better spent focusing on conserving what we do have than spending it on an animal that has been extinct for thousands of years,” he said.

    You can't always predict a heavy rain or remember your umbrella. But designer Mikhail Belyaev doesn't think that forgetting to check the weather forecast before heading out should result in you getting wet. That's why he created lampbrella, a lamp post with its own rain sensing umbrella.

    The designer says he came up with the idea after watching people get wet on streets in Russia. “Once, I was driving on a central Saint Petersburg street and saw the street lamps lighting up people trying to hide from the rain. I thought it would be appropriate to have a canopy（伞蓬）built into a street lamp.” he said.

    The lampbrella is a standard-looking street lamp fitted with an umbrella canopy with a built-in electric motor which can open or close the umbrella on demand. Sensors（传感器）first ensure that it starts raining and the motors open up in response to their sensors and then people can protect themselves from the rain under the canopies.

    In addition to the rain sensor, there's also a 360° motion sensor on the fiberglass street lamp which detects whether anyone's using the lampbrella. After three minutes of not being used, the canopy is closed.

    According to the designer, the lampbrella would move at a relatively low speed, so as not to cause harm to the pedestrians. Besides, it would be grounded to protect from possible lightning strike. Each lampbrella would offer enough shelter for several people. Being installed（安装）at 2 meters off the ground, it would only be a danger for the tallest of pedestrians.

    While there are no plans to take lampbrella into production, Belyaev says he recently introduced his creation to one Moscow Department, and insists his creation could be installed on any street where a lot of people walk but there are no canopies to provide shelter.

Do you believe that things are connected for no scientific reason at all? For example, do you avoid saying the word "four" to avoid bad luck? If so, you have a superstition (迷信). And you're not alone — all kinds of people have them.

For example, Portugal's soccer superstar Cristiano Ronaldo always steps onto the pitch (球场) with his right foot first, according to The Telegraph. And sports players are not alone in having superstitions. A visitor once asked the Nobel Prize winning scientist Niels Bohr whether he really believed that the horseshoe he'd hung at his country home was lucky. "Of course not," the Danish physicist said. "But I understand it's lucky whether you believe in it or not."

One recent study found that even scientists at MIT and other top US schools tended to look for a meaning in natural events, similar to the connection between stepping on the pitch and playing soccer well, according to The Atlantic. When the researchers gave the scientists little time to answer questions, they were twice as likely to agree with statements such as "Trees produce oxygen so that animals can breathe" as they were when they had more time to think about their reply.

It seems that fear can make people think differently in this way, too. In a British study, students imagined meeting a "witch" who said she would cast (施魔法) an evil spell(符咒) on them. About half said a scientist should not be worried about the spell. Yet each of them said that, personally, they wouldn't let the witch do it to them.

So why are so many of us superstitious? Well, it seems to be our way of dealing with the unknown. "Many people quite simply just want to believe," Brian Cronk, a professor of psychology at Missouri Western State University, said in a 2008 interview. "The human brain is always trying to work out why things happen, and when the reason is not clear, we tend to make up some pretty bizarre (古怪的) explanations."

    And these explanations aren't completely unhelpful. In fact, superstitions can sometimes work and bring real luck, according to psychologists at the University of Cologne in Germany in the May 2010 issue of the journal Psychological Science. They found that believing in something can improve performance on a task like an exam.

    So, what about you? What superstitions do you follow to keep you safe and successful?

    Earlier this month, 6-year-old Isaac went on vacation to Fort Walton, Florida, with his family. While they were there, his mother Garrett learned about LuLu, a restaurant that offers food to customers with food allergies(过敏).

    At LuLu, Isaac could eat a salad and a bowl of chicken soup with rice. "Isaac looked at me as if asking, 'Is this OK?' " Garrett said. Once his mom gave the OK, Isaac enjoyed for the first time the experience of eating at a restaurant. "That look on his face was like, 'This is the coolest thing I've ever done,' " Garrett added.

    Garrett and her family rarely eat out because of Isaac's food allergies. When they do, she cooks something for Isaac at home before they leave and brings it with her to the restaurant. "It's not fun and it feels unfair," she said.

    Their night at LuLu marked a celebration for Isaac. Garrett shared the moment on the restaurant's Facebook page. "Thank you from the bottom of my heart for giving Isaac this wonderful experience," she wrote in her post.

    Barnett, the restaurant's manager, said, "When customers tell the staff that someone in their group has a food allergy, I assist with the order by passing it to the kitchen, ensuring it's cooked in a separate station and delivering the finished food to the guests. We have been improving this process over the past ten years since our allergy program was started."

    On Garrett's Facebook post, LuLu thanked Garrett for sharing her story. "Thank you for sharing your experience with us," the restaurant wrote in a comment, "We are excited to see your son so happy!"

    Garrett is hoping her post's popularity will convince other restaurants to be more considerate. "LuLu takes it seriously as we take it – nothing could make us happier than that," she said.

    There's a new frontier (新领域) in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

    Food production

    With a 3D printer, a cook can print complicated (复杂的) chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that—it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to “re-create forms and pieces” of food that are “exactly the same,” freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

    Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, “Food printing could allow consumers to print food to meet their own nutritional needs, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand.”

    Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste (糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

    Long Beach, a 28-mile stretch of beach, lies in southwestern Washington, and it is generally called Long Beach Peninsula (半岛). Communities there take you back to old days of a simple and slow-paced life style. Here, visitors can relax and enjoy the good of total rest.

    Bird Watching

    There are different kinds of birds in Long Beach. It is best if you observe them from a distance and do not try to frighten them. The Southwest Loop Trail Map can be gotten through the Long Beach Peninsula Visitors Bureau Office by calling 1-800-451-2542.

    Horses

    A popular activity in Long Beach is horseback riding. Two businesses in the city of Long Beach offer guided horseback tours along the beach: Back Country Wilderness Outfitters and Skipper's Equestrian Center. You may also bring your own horse. Among the adventures offered with horses is a wagon (四轮马车) ride along the beach, a carriage ride through Sea view or Long Beach, a back country (偏远乡村) packing trip, or a sunset ride by horseback on the beach.

    Camping

    RV (娱乐车) and tent camping aren't allowed on the beach, but there are private camp­ grounds and RV parks in the area, as well as Cape Disappointment State Park. Camp fires are allowed within 100 feet of the beach, but must be away from the dry grass.

    Swimming and Other Activities

    Swimming is allowed, but you must be careful. The waters are very cold and dangerous. Surfing is advised only for experienced surfers. Beach driving is allowed at certain spots on the beach. The speed limit is 25 mph. Building sand castles, digging sand to find something, bicycle riding, and flying kites are also popular activities in the area.

    You can find right hotels easily in the area. Enjoy your trip to Long Beach, Washington!