When Charles Lee handed me the small red notebook in 1974, he changed my life. “While you are traveling, you should keep notes of things you see and do,” he explained.

    I was 20 years old, a junior in college, spending a term at the University of London. Charles was a retired traveling salesman. I was staying with him in his cottage in Kendal, located in the Lake District of northern England. It was a one-week homestay the university arranged for us before classes began.

    I took his advice. I wrote in the notebook every day during the homestay. Back in London, I recorded weekend trips to Wales, Yorkshire, France, and Spain. I commented on my classes, professors, and classmates. I contrasted my life at a small college in the US with my wandering through the streets of London, my introduction to life in a big city, and my initial travels outside the US. I tracked ideas I had about my life and my future.

    When I wrote in the notebook, I struggled with a sense of my audience and purpose. Who would read this? Were these writings just for me, or did I want others to read them? Was I recording events and ideas just as a prompt(提示) to memory, or was there some larger purpose for this daily exercise?

    I knew I was recording events, thoughts, words that were important to my life. I imagined a future me sitting down to read the pages. I wondered what it would feel like to read those words later. I wondered where I would be and what my life would be like.

    I filled the notebook Charles gave me. I bought a new one and filled it. Then another and another. I continued writing in notebooks for four decades. By that time, they filled two boxes in my garage.

    I had reread some of the journals. Specific volumes had provided me with the background I needed for dozens of articles for magazines. But I had never read them all. Recently, I decided to bring my collection of notebooks into my office and replay my life. As I opened the first box, I suddenly became nervous would I like the former me described on those pages? There was a risk in opening that first notebook. I did it anyway.

    Charles had been right. I remembered the big events and the central happenings, but on each page were many details I hadn't retained(保留).

    The pages revealed highlights from college classes and stories about roommates and friends. I read anxious comments I'd written as I'd launched my teaching career, learned to write lesson plants, assigned grades for student work, and solved discipline problems. I reflected on my coming marriage, then the wedding, and eventually the proud moments when I held each of my three girls as a father. I recounted more trips—returning to Europe, teaching in South America, going on safari(游猎) in Africa, and exploring Greenland. I relived memories of trails hit, rivers crossed, and mountains climbed.

    The writings in those journals framed my life. I hadn't written every day. I often skipped a few days or even weeks, but I always picked up the writing when it felt important. Journals went with me when I traveled, and I often wrote in them at school when my own students were writing.

    It took several long evenings to read through the notebooks, taking me on tour spanning(持续) 42 years. As I read I could recall sitting on a bench in Trafalgar Square in London or in our apartment in Peru to write to the future me. It was then that I realized: I am now the person I was writing to throughout those years.

    Lawns（草坪）are some of the most common things in the world until you really start thinking about them. That's when you realize that they make no sense. Why do people keep these uninteresting, pointless little plants outside their homes? They're not beautiful like flowers, they don't provide food and you have to take care of them constantly.

    Israeli bestselling author Yuval Noah Harari thought these deeds were weird too. He looked into their history and ended up with an interesting story.

    No one considered putting patches of grass outside their homes in ancient times. That changed in the Middle Ages, when French and English kings and nobles started putting patches of grass at their castle entrances.

    “Well-kept lawns demand land and a lot of work,” wrote Harari in his book. “In exchange, they produce nothing of value.” Peasants could never afford to waste their time or land on lawns, so these lawns were a perfect status symbol（身份的象征）for nobility（高贵）.

    When the Industrial Revolution began in the 18th and 19th centuries, the middle classes started being able to afford their own suburban（郊区的）houses. And guess what became the suburban status symbol? A perfectly kept lawn.

    The popularity of lawns continued to grow, taking over public event spaces and sports. In the past, people played sports on all kinds of surfaces—dirt, ice, sand. But in the last couple centuries, they made the switch to green grass.

    “Grass is nowadays the most widespread crop in the USA after corn and wheat,” Harari continued. Lawns spread beyond Europe and the U.S, and they're now status symbols around the world.

    Suburban people may not realize it, but they care for lawns just because centuries ago, French and English kings wanted to show off by intentionally planting something useless. It's strange that people should continue to spend so much time and money on what's really a leftover（遗留物）from the Middle Ages. When you plan your house, you can shake off（摆脱）the cultural leftover and imagine for yourself a rock garden or some other new creation.

    PhoneSoap: Charge and Clean Your Phone

    You may charge your phone every day, but do you clean your phone as much? Whatever your hands touch, your phones touch. It has been discovered that some phones have 18 times more bacteria and viruses than any surface in a public restroom. So it probably won't surprise you that a 2011 University of London study found that one in six of our phones have bacteria and viruses on them—specifically, the bacteria called E. coli.

    The research on bacteria and viruses led to the invention of PhoneSoap. It is not actually liquid like dishwasher soap. It is a phone charger that uses the electromagnetic radiation (辐射) used in hospitals to kill 99.9 percent of bacteria and viruses, cleaning your phone while it charges.

    “There are really certain types of bacteria and viruses that we should not be in touch with, and they are really on our phones,” says Wes Barnes, the PhoneSoap co-founder. It all started while his cousin and co-founder, Dan LaPorte, was in his cancer research lab at college. “He realized he got the idea of getting rid of bacteria and viruses on the phones,” said Barnes. “In the lab they used UV-C light for destroying them. He realized this would be the fastest, most powerful way to kill any bacteria and viruses living on electronic machines.”

    PhoneSoap looks like a little metal suitcase. Your phone rests in to charge and get cleaned at the same time. Instead of plugging your phone into the wall, you'd plug it into the PhoneSoap charger box. The process only takes a few minutes but, Barnes says, “The idea is that you can leave it in there overnight if you want to keep charging. Reflective paint keeps the light completely around the phone so it cleans the phone fully.”

    The co-founders spent 2013 finding the right companies and they started shipping the product in late November. By last week's International Consumer Electronics Show in Las Vegas, PhoneSoap was all grown-up. Both co-founders have left their previous jobs and are selling PhoneSoap nonstop. “We're shipping almost more than we can handle each day,” Barnes says. “It's been a great adventure.”

    To foreigners Chinese food isn't a meal. It's an experience. Failing to order the right food and struggling with chopsticks are only parts of the adventure every time I sit down in a restaurant.

    In one of our favorite Sichuan restaurants, it took 3 waiters and 15 minutes for us to order only our drinks. I simply wanted water, but my dad wanted to try the fresh juice they had listed on the menu. There were two problems, however. There were neither pictures nor English on the menu. After several hand gestures, he ended up ordering just a coca cola to simplify things.

    One of our most embarrassing moments was at Xiabuxiabu, a very famous hotpot chain. As soon as we walked in, the entire restaurant seemed to stare at us. Uncomfortable already, we had the most difficulty ordering our meal, since there were so many steps to the whole process. Fortunately, the waitress was very patient and successfully gave us our food. Although it was not the best food I had in Beijing, it was certainly entertaining dropping things into the boiling pot of soup. Once, I tried picking up a dumpling to show my father and dropped it onto his pants. I looked behind me, and people were laughing secretly at my chopstick skills.

    No matter how many difficulties we have regarding food, our experiences give the best stories to tell. The servers are always understanding of our situation and their friendliness is exceptional. They always greet us with a big smile even when they realize they have to clean up the noodles slipped through our clumsy chopsticks.

    Welcome to Hawks Cay Resort

    Centrally lying between Miami and key west, Hawks Cay Resort offers the perfect union of solitude and convenience. Here you can enjoy the best qualities of the Caribbean-clear green waters, endless sunshine, excellent fishing and diving chances, and fresh seafood.

    THE MIDDLE OF EVERYTHING

    Hanks Cay lies in the middle of the Florida Keys on the quiet island of Duck Key. The resort is just over an hour's drive from Key West attractions, and only minutes from the village of Marathon where you'll find the Seven-Mile Bridge, the Marathon Turtle Hospital, shopping changes and more.

    GETTING TO HAWKS CAY RESORT

    By Land

    Drive the Overseas Highway, awarded one of America's most scenic roads, as you travel across historic fishing bridges, and admire the blue and green water of the Atlantic Ocean and Florida Bay. Hawks Cay centrally lies only 90 miles by car from Miami and 130 miles from Fort Lauderdale. Cars can be rented from Marathon Airport, lying just a few miles from the resort.

    By Air

    Daily flights are offered into nearby Miami, Fort Lauderdale/Hollywood and Key West International airports. Hawks Cay is proud to partner with the Marathon Jet Center, lying just 9 miles from the resort, offering lights and private jet service.

    Fly direct to Marathon International Airport from Fort Lauderdle, Miami, Marco Island and Naples for as low as $222 per person one way. Flight time is approximately 38 minutes.

    By Sea

    Hawks Cay can easily be reached via the Atlantic Ocean or Gulf of Mexico. Hawks Cay's full-service marina features fees for ships up to 110 feet, and all the boating and fishing supplies you'll need during your stay in the beautiful Florida Keys.

    A single dose(剂量) of an experimental vaccine(疫苗) can protect mice against the Zika(寨卡) virus, raising renewed hope of a vaccine for humans, say scientists. The US team say the results, published in Nature, are "striking" and should encourage research efforts.

    Tests in humans could begin in months. But even if these go well, a licensed vaccine for widespread use to protect those at most risk ­ such as pregnant women ­ would still be years away, experts advise. Zika has been spreading across Central and South America and, most recently, Africa. More than 60 countries and territories now have continuing transmission(传播) of the disease, which is carried by mosquitoes. The virus causes serious birth damages during pregnancy and has been declared a global public health emergency.

    Now, developing a vaccine for pregnant women to protect their unborn babies is an international research priority(优先事项). US scientists from the Walter Reed Army Institute of Research, the Beth Israel Deaconess Medical Center and Harvard Medical School tested two types of Zika vaccine in mice – one based on bits of genetic(基因的) code from the virus and another that is an inactive (and therefore harmless) copy of Zika. Both worked well, protecting every mouse that was immunised against the virus. In comparison, all of the mice not given the vaccine caught Zika after they were exposed to it.

    Researchers say they will push ahead with developing the needed virus vaccine. There are many existing vaccines for other disease that use this type of technology, while there are relatively few DNA­based vaccines. Of course, future tests will need to check the vaccine is safe and effective in humans, as well as how long the immunity might last.