When I was little, I always wanted a luxurious house. That was my idea to be successful. I took all the classes with full carefulness and tried to do well in the exams with my mind set on going to a key school. I just knew that I would somehow become famous and be able to afford the dream house. All the way through junior years, my mind was planning this wonderful future.

    Then in the tenth grade, many losses changed my mind. First, one of my friends died at 16. Soon after, my great-grandmother passed away, followed by my beloved fourth-grade teacher. These events left me not knowing what to do or where to go. Death had never touched me so closely.

    After a long period of emptiness, it finally struck me: Life is not promised and neither is future success. Though I was attempting to achieve material success, I was not enjoying my daily life. I realized that finding inner peace, purpose and happiness will stick with me forever and that is real success.

    Enjoying life's precious quirks(偶发事件) makes an ordinary person more successful than a wealthy person who isn't content and takes everything for granted. The summer before senior years, my attitude changed greatly. Instead of memorizing facts, I began learning skills. Instead of focusing on the future, I focused on today and the many blessings and successes that came with it.

    I still get excellent grades, but now I devote weeks to studying instead of struggling for exams, and I think about the future with a deeper sense of meaning. For me, being successful means truly living life each day.

    Mountaineers have noted that as they climb, for example, up to the 12,633­foot Humphreys Peak in Arizona, plant life changes greatly. In the Sonoran Desert, one climbs into a pine forest at 7,000 feet and a treeless tundra(冻土带) on the top of the mountain. It may seem that plants at a given altitude are associated in what can be called “communities” －groupings of species. The idea is that over time, plants that require particular climate and soil conditions come to live in the same places, and are frequently to be found together. Scientists study the history of plant life and build up a picture of how groups of plants have responded to climate changes and how ecosystems develop. But are these associations, which are real in the present, permanent?

    A great natural experiment took place on this planet between 25,000 and 10,000 years ago, when small changes in the earth's orbit caused great sheets of ice to spread from poles. These glaciers(冰川) covered much of North America and Europe to depths of up to two miles, and then, as the climate warmed, they retreated. During this retreat, they left behind newly uncovered land for living things to occupy, and as those living things moved in they laid down a record we can read now. As the ice retreated and plants started to grow near a lake, they release pollen(花粉). Some would fall into the lake, sink to the bottom and mix with the sand. By drilling into the lake bottom it is possible to read the record of the plant life around the lake. The fossil record seems clear; there is little or no evidence that entire groups of plants moved north together. Things that lived together in the past don't live together now, and things that live together now didn't live together in the past. Each individual living things moved at its own pace. The fossil record seems to be telling us that we should be thinking about preserving species by giving them room to move about－to respond to environmental changes.

    Beyoncé Knowles can do something that many humans struggle with: sing and dance at the same time. But, it turns out this great ability is not unique to humans. The superb lyrebird, already known to be a gifted singer, can perform coordinated(协调的)song­and­dance routines(一套舞蹈动作)that put most humans to shame.

    The superb lyrebird is one of only two lyrebird species living in Australia, the other named Albert's lyrebird. Male lyrebirds have tails in the shape of an ancient musical instrument when spread out. Like most animals with beautiful body parts, the males use their tails to attract females. Each one sets up a small mound(小丘)on the forest floor, where he walks around proudly and sings. He also shows his tail by holding it over his head.

    Lyrebirds are gifted mimics(模仿者), so their songs combine their own calls, the songs of other species, and sounds they have heard in the forest. That would be enough showing off for other animals, but male superb lyrebirds also dance.

    Anastasia Dalziell of the Australian National University in Canberra filmed 12 lyrebirds in the wild. She found that males only danced during four song types, and that each song type was accompanied by a specific move. “Lyrebirds match different dance styles to different types of songs, ”she says. For example, when the male sang a series of rapid notes he also stepped to the side and held his tail wide. Another song type was accompanied by jumping and moving up and down, with the tail held narrow.

    “Our results suggest that the coordination between song and dance—like movements we see in humans can occur in other animals,” says Dalziell. Female lyrebirds might prefer males that are better at coordinating song and dance, although there is no evidence of that yet.

    Some best music and opera holidays for 2019.

    Tangle wood Festival

    The villages of Lenox and Stockbridge in western Massachusetts have been the summer home of the Boston Symphony Orchestra for more than 80 years, and its annual Tanglewood festival is East Coast America's most distinguished music event. Andris Nelsons, BSO music director, conducts 14 of the concerts and star performers include Emanuel Ax, Paul Lewis and Anne-Sophie Mutter. Tickets on sale Feb 10.

    June 15—Aug 25 (tanglewood.org)

    Aspen Festival

    This year is the 70th anniversary of the Aspen Music Festival, one of the longest-running and most prestigious festivals in the United States. The 2019 program has yet to be announced, but a typical eight- week summer season includes more than 400 classical music events—including concerts by five orchestras, solo (独奏) and classical music performances, fully staged opera productions, music lessons, lectures, and children's programming. Tickets and details available in February.

    June 27—Aug 18 (aspenmusicfestival.com)

    Grand Teton Music Festival

    Aspen's great classical music competitor in the Rocky Mountains is the Grand Teton, which has been held in Jackson Hole since 1962 and at its heart is a timber concert hall, the Walk Festival Hall, famous for its friendly atmosphere and excellent natural sound. Despite its relatively modest size, the hall attracts the greats—current music director is the Scottish conductor Donald Runnicles. The program for 2019 is yet to be announced but subscriptions are on sale from Feb 1, single tickets from March 1.

    July 2—Aug 17 (gtmf. org)

    Salzburg Festival

    The excitement is building in Salzburg both for this summer and for its 100th anniversary year in 2020. Bar the Proms, it is the world's oldest music festival and this year it will pack in an unbelievable 199 performances in 43 days at 16 venues. This year's theme is ‘Myths' and includes first public performances of Mozart's Idomeneo and George Enescu's opera dipe.

    July 20—Aug 31 (salzburgfestival. at)

    As smog forced students to stay home, the online learning industry saw a sharp increase in consumers.

    During the air pollution red alert from Dec. 8 to 10 last winter, the Beijing Commission of Education ordered all kindergartens, primary schools and middle schools to suspend classes (停课). But the commission urged that, "Teachers should guide students to make full use of digital materials and conduct online learning at home".

    According to the China Education and Research Network, the number of new users of 17zuoye. com, an online homework platform, tripled (增至三倍) on Dec. 8 compared to the previous day.

    Online courses companies also adopted special measures to meet students' demand for Internet learning during the red alert period. For example, New Oriental offered free online English classes for three days for school students as well as online question answering services.

    Recent years have seen the popularity of online courses increase sharply in China. Massive Online Open Courses (MOOC), for example, originated in the United States but have become widespread in China since 2013. Some Chinese universities, including Tsinghua University and Peking University, have started their own MOOC platforms. "MOOCs have enlarged the time and space of teaching, fired up learners' interest, helped more people benefit from high quality educational resources and accelerated reform in many aspects of teaching," an official at the Ministry of Education told China Daily.

    You've heard of the fat suit and the pregnancy suit; now meet AGNES—the old person suit.

    AGNES stands for "Age Gain Now Empathy(换位体验)System" and was designed by researchers at MIT's AgeLab to let you know what it feels like—physically—to be 75 years old. "The business of old age demands new tools," said Joseph Coughlin, director of the AgeLab. "While focus groups and observations and surveys can help you understand what the older consumer needs and wants, young marketers never get that ‘Ah ha!' moment of having difficulty opening a jar, or getting in and out of a car. That's what AGNES provides. "

    Coughlin and his team carefully adjusted the suit to make the wearer just as uncomfortable as an old person who has spent a lifetime eating poorly and not doing much exercise. Special shoes provide a feeling of imbalance, while braces on the knees and elbows limit joint mobility. Gloves give the feeling of decreased strength and mobility in the hands and wrists, and earplugs make it difficult to hear high-pitched sounds and soft tones. A helmet with straps(带)attached to it presses the spine(脊柱).

    VAGNES has been used most recently by a group of students working on a design of an updated walker. By wearing the suit they could see for themselves what design and materials would make the most sense for a physically limited older person. Coughlin said the suit has also been used by clothing companies, car companies and retail goods companies to help them understand the limitations of an older consumer. An unexpected benefit they've found with AGNES is that it has become a powerful tool to get younger people to invest in their long-term health.