The Brown Bear

    My wife Laura and I were on the beach, with three of our children, taking pictures of shore birds near our home in Alaska when we spotted a bear. The bear was thin and small, moving aimlessly.

    Just a few minutes later, I heard my daughter shouting, “Dad! The bear is right behind us!” An aggressive bear will usually rush forward to frighten away its enemy but would suddenly stop at the last minute. This one was silent and its ears pinned back—the sign of an animal that is going in for the kill. And it was a cold April day. The bear behaved abnormally, probably because of hunger.

    I held my camera tripod (三脚架) in both hands to form a barrier as the bear rushed into me. Its huge head was level with my chest and shoulders, and the tripod stuck across its mouth. It bit down and I found myself supporting its weight. I knew I would not be able to hold it for long.

    Even so, this was a fight I had to win: I was all that stood between the bear and my family, who would stand little chance of running faster than a brown bear.

    The bear hit at the camera, cutting it off the tripod. I raised my left arm to protect my face; the beast held tightly on the tripod and pressed it into my side. My arm could not move, and I sensed that my bones were going to break.

    Drawing back my free hand, I struck the bear as hard as I could for five to six times. The bear opened its mouth and I grasped its fur, trying to push it away. I was actually wrestling (扭打) with the bear at this point. Then, as suddenly as it had begun, the fight ended. The bear moved back toward the forest, before returning for another attack—The first time I felt panic.

    Apparently satisfied that we caused no further threat, the bear moved off, destroying a fence as it went. My arm was injured, but the outcome for us could hardly have been better. I'm proud that my family reminded clear-headed when panic could have led to a very different outcome.

Excellent Smartphone Apps

    Space

    Space helps you set goals to be more mindful of your screen usage. When you install（安装）Space, you'll complete a few questions about your smartphone habits and then select a user type that is the best match. The app then sets screen unlock and time-use goals. The app will send notices as screen time increases and reward you with different badges（徽章）when you meet your goals.

    AntiSocial

    AntiSocial is one of the best-known screen-reduction apps available on Android. While it provides many of the standard functions like screen time limits and app blocking, it has an advantages. AntiSocial compares your screen usage data（数据）to other people in your age, so you'll an idea if you're using your phone more than they do.

    Off the Grid

    For those who truly have a problem staying off that phone, Off the Grid may be for you. Off the Grid completely blocks your phone for a length of time you determine. If you want to use your phone after you're turned on Off the Grid, it's going to cost you. The app will charge you $1 each time you end your off-time early.

    What are two things that make humans different from animals? One is language, and the other is music. It is true that some animals can sing (and many birds sing. better than a lot of people). However, the songs of animals, such as birds and whales, are very limited. It is also true that humans, not animals, have developed musical instruments.

    Music is strange stuff. It is clearly different from language. However, people can use music to communicate things—especially their emotions. When music is combined with speech in a song, it is a very powerful form of communication.

    If music is truly different from speech, then we should process music and language in different parts of the brain. The scientific evidence suggests that this is true. Sometimes people who suffer brain damage lose their ability to process language. However, they don't automatically lose their musical abilities. For example, Vissarion Shebalin, a Russian composer, had a stroke in 1953. It injured the left side of his brain. He could no longer speak or understand speech. He could, however, still compose music until his death ten years later. On the other hand, sometimes strokes cause people to lose their musical ability, but they can still speak and understand speech.

    Why does music have such a strong effect on us? That is a harder question to answer. Geoffrey Miller, a researcher at University College, London, thinks that music and love have a strong connection. Music requires special talent, practice, and physical ability. That's why it may be a way of showing your fitness to be someone's mate. For example, singing in tune or playing a musical instrument requires fine muscular control. You also need a good memory to remember the notes. And playing or singing those notes correctly suggests that your hearing is in excellent condition. Finally, when a man sings to the woman he loves, it may be a way of showing off.

    However, Miller's theory still doesn't explain why certain combinations of sounds influence our emotions so deeply. For scientists, this is clearly an area that needs further research of sounds influence our emotions so deeply. For scientists, this is clearly an area that needs further research.

    Sit down, close your eyes and relax. Think about your childhood and the memories you created. What was your favorite childhood memory and what was your favorite as a child? Or what your favorite Christmas present or your favorite candy bar when growing up? Answers may come easily for some people but for others, it may take more time to think about.

    Mary Jo McCarthy of Pequot Lakes wants to help others document their childhood memories which could be treasured by current families and for generations to come. McCarthy, 64, a short story author and retired columnist (专栏作家) for the Lake Country Echo weekly newspaper, began hosting a writing seminar (研讨班) titled "A Time to Remember". The closes are limited to 12 people and are conducted in the nursery at Lutheran Church of the Cross in Nisswa and the registration fee is $25.

    McCarthy said what led her to start the writing seminars was writing others' biographies(传记). A retired businessman asked her to write his biography as a ghost writer. She said others from her church in Pequot Lakes had also asked her to write their biographies because they didn't know how to write them. She thought hosting a class to help people write their own biographies would be more beneficial to them.

    McCarthy said people had busy lifestyles those days and didn't have a chance to sit down and write down their memories that they might forget and never remember. She said writing down the memories would document the person's life, so other family members, especially future generations would be able to read about them.

    You're probably used to the regular upgrades in our cell-phone networks. There was 2G, which came along in 199l, replaced with 3G in 2001, followed by 4G in 2009. Now we're hearing about the coming of 5G.

    But 5G is a much bigger leap than before. 5G, of course, is much faster than 4G in the real world and a 5G phone in a 5G city will enjoy Internet speeds between 9 and 20 times as fast. The arrival of 5G also means enormous leaps forward in capacity－so much that every cell-phone plan will offer cheap, truly unlimited Internet access. "The consequences of that are huge," says Sherif Hanna, Qualcomm's director of 5G marketing. For example, apps will no longer degrade (降低) your video quality or postpone downloading when you're out of Wi-Fi range. In fact, you'll probably prefer to do your downloads when you're on cellular (使用流量) because 5G will be much faster than whatever service you've got at home or work.

    "However, not everyone is excited by the 5G development. The new standard gets its speed partly by using existing transmission(传输) frequencies more efficiently and partly by using the millimeter wave range. That's a big, juicy line of radio frequencies that are currently underused because millimeter wave is really hard to use," Hanna says.

    These frequencies are much higher than anything we've used for the cellular, which means they can offer unbelievable speed－but at the cost of range. Millimeter wave cellular towers have to be about 500 feet apart. Cell carriers not only will have to upgrade all their cell transceivers (called small cells) but will install(安装) a lot more of them as well.

    That's why the millimeter wave flavor of 5G, the superfast coverage, will be available only in densely populated cities such as New York and San Francisco. In suburban and rural areas, 5G will bring a speedup of "only" nine times faster.