Biologists believe that love is fundamentally a biological rather than a cultural construct, because the capacity for love is found in all human cultures and similar behavior is found in some other animals. In humans the purpose of all the desire is to focus attention on the raising of offspring. Children demand an unusual amount of parenting, and two parents are better than one. Love is a signal that both partners are committed, and makes it more likely that this commitment will continue as long as necessary for children to reach independence. But what does science have to say about the notion of love at first sight?

    In recent years the ability to watch the brain in action has offered a wealth of insight into the mechanics of love. Researchers have shown that when a person falls in love, a dozen different part of brain work together to release chemicals that trigger feelings of euphoria, bonding and excitement. It has also been shown that the unconditional love between a mother and a child is associated with activity in different regions of the brain from those associated with pair-bonding love.

    Passionate love is rooted in the reward circuitry of the brain—the same area that is active when humans feel a rush from cocaine. In fact, the desire, motivations and withdrawals involved in love have a great deal in common with addiction. Its most intense forms tend to be associated with the early stages of a relationship, which then give way to a calmer attachment form of love one feels with a long term partner.

    What all this means is that one special person can become chemically rewarding to the brain of another. Love at first sight, then, is only possible if the mechanism for generating long-term attachment can be triggered quickly. There are signs that it can be. One line of evidence is that people are able to decide within a second how attractive they find another person. This decision appears to be related to facial attractiveness, although men may favor women with waist-to-hip ratio of 0.7, no matter what their overall weight is. (This ratio may indicate a woman's reproductive health.)

    Another piece of evidence comes from work by a psychologist at Ben-Gurion University, who found in a survey that a small percentage (11%) of people in long-term relationships said that they began with love at first sight. In other words, in some couples the initial favorable impressions of attractiveness triggered love which sustained a lengthy bond. It is also clear that some couples need to form their bonds over a longer period, and popular culture tells many tales of friends who become lovers.

    One might also assume that if a person is looking for a partner with traits that cannot be quantified instantly, such as compassion, intellect or a good sense of humor, then it would be hard to form a relationship on the basis of love at first sight. Those more concerned with visual appearances, though, might find this easier. So it appears that love at first sight exists, but is not a very common basis for long-term relationships.

    Mom and Dad are two of the most important people in your life.You probably see at least one of them every day. If your dad worships（崇拜）the Pittsburgh Stealers,you're likely to grow up being a big fan of that football team.And if your mom loves to read,you just might grow up carrying a book wherever you go,just like she does.

    Here are four ways you can stay.close:and build a strong relationship with your parents.

    ⑴Spent time together.How much time do you spend just enjoying each other's company?

    Instead of playing a computer game or watching TV,maybe you can ask your mom and dad to play with you.Go outside together,try a board game,or read a book out.

    ⑵Share your feelings and ask for help.Your mom or dad might not know that you're having a problem.Tell a parent if you're sad or struggling with something.

    ⑶Show your care. Some families are always kissing, hugging, and saying "I love you". It's important to show that you care for each other. In addition to kisses and hugs, kids and parents show their love by respecting each other, being caring, polite, and thoughtful.

    ⑷Whatever you do, do your best! You, don't have to be perfect, but when you do your best, you make your parents proud. It makes them happy to see how you're turning into such a great kid. Why? Because it lets them know they're doing a good job.

    Life is full of funny moments, and not just for humans.

    Over the years, studies by various groups have suggested that monkeys, dogs and even rats love a good laugh. People, meanwhile, have been laughing since before they could talk.

    Jaak Panksepp, a professor at Bowling Green State University, US, said he would not be surprised if positive feelings could be produced in some animals. Dolphins, for example, have long attracted animal researchers because of the complex (复杂的) ways in which they communicate: a rich variety of sounds of different rhythms. A decade ago, researchers studying dolphins at the Kolmarden Wildlife Park in Sweden noticed a set of sounds the dolphins made during play-fighting. They concluded that the purpose of the sound was to suggest that the situation was pleasant and to prevent it from a real fight.

    Panksepp has even seen evidence of joy in crayfish (小龙虾). When given small amounts of drugs such as cocaine (可卡因) in a certain place, they appear to connect that location with pleasure. “Given the chance, they will always return to that place, perhaps in the hope of getting more,” he says. Panksepp wasn't sure it equals the same happiness that humans get from cocaine, but said it “could be in the same evolutionary category”.

    More studies are needed to really understand animals' laughter. Strangely enough, the answers may help with our own desires for cures for mental illnesses. Panksepp's experiments may soon lead to a new antidepressant (抗抑郁) drug that works by using the pathways in the brain behind positive feelings and joy. Perhaps pleasure and laughter in the animal world will help solve the depression in our own species one day.

    Junxi “Emma” Yang played Carnegie Hall before she got to high school. But her piano skills may have to take a back seat to her programming skill.

    According to World Journal, a US-based Chinese media organization, Emma, a 14-year-old student at the Brearley School in Manhattan, New York started coding when she was 6. Four years later, her beloved grandmother began developing Alzheimer's.

    When Emma's family moved to New York from Hong Kong in 2014, she became passionate about programming. By the time she was 10, her grandmother had already developed the disease.

    Emma got right to work. With her coding skills, she had a smartphone app created before long, designed to help people suffering from Alzheimer's.

    “Now, 'Timeless' has moved to the second stage of design,”says Emma.

    Emma hopes her grandmother can benefit from the artificial intelligence technology built into “Timeless,” the app Emma developed, to overcome her memory loss.

    Emma's newly finished app has gained support from Dr. Melissa Kramps, an Alzheimer's specialist, and from Kairo, a developer specializing in artificial intelligence.

    Timeless uses facial recognition to remind someone with Alzheimer's of vital information about the person whose photo they are looking at on their screen. It also signals whether they have just called somebody.

    The app also allows for the photo-talking, then moves to identify the people on the screen.

    The Timeless project is featured on the website Indiegogo for fundraising. Emma is hoping to raise $50,000 and work alongside professional programmers to have Timeless launched by the end of 2018.

    Many people have hailed Emma for her efforts. Bill Gates voiced his support, commending her on her bid to help bridge the gap between people with Alzheimer's and the ones they love.

    The team I work in just has 2 new interns（实习生）, and I happen to be their supervisor.

    After today's lunch break, I saw that one of them was reading things on her smart-phone, maybe on some social network, I guessed. I went to her and said “There's another document here needing translation. Do you have time to finish it for me?”

    That document was not in her assigned workload. But I thought I could let her challenge herself a little bit with it, seeing that she seemed to have time.

    “Yes, I do have time.” She said, “But I'm just an intern.”

    I didn't quite know what to say back then. After a while I mumbled（咕哝） “Right. Yes.” And I turned around and left.

    I recalled the time when I was an intern for the first time. I, too, managed to finish my workload so fast, just like her. So I asked my supervisor “Is there anything else that I can help?” And she happened to have a plan to make. But she didn't have time. So she let me do the research and make a draft for her.

    I was not very familiar with the job but still tried to carry it out based on my understanding and make it as professional as possible. And my supervisor was really satisfied with the draft. Later, she told me “You saved me a lot of time. I didn't need to create it from scratch.” And she told me in details how I should have done the plan differently. I learned a lot about the operation in the process. After that, she had come to trust me completely. I got my current job all because of her recommendation.

    Yes, I was just an intern with a low salary. But I bought a better future with my extra labor.

    There's a kind of poverty called shortsightedness.

Lanrick Jr. Bennett holds a unique title in Toronto: bicycle mayor. He led a Halloween Kidical Mass ride recently, which I attended with my daughter, son-in-law, their two dogs, and my granddaughter. He is working towards making cycling mainstream and safe for all residents in the city. I did not know that Toronto had a bicycle mayor; I surely would have voted for him in an election.

The bicycle mayor program is run by BYCS, an Amsterdam-based global NGO that believes "bicycles transform cities and cities transform the world". Standing in the strange but wonderful Bentway, a park built under an elevated expressway, Bennett says, "BYCS has 150 bicycle mayors across the world. And through a few friends putting in some really nice letters of encouragement, BYCS offered me a two-year term as an advocate here in the city of Toronto, becoming the first bicycle mayor of the city."

Bennett says he is boosting the work being done to make cycling more mainstream in Toronto. "I am giving a bit more exposure to the great work that has allowed me to be able to ride a bike throughout the city. It's getting better, we're seeing more infrastructure（基础设施）, and we're seeing more people not wanting to depend on cars as their primary piece. I'm happy that I have been part of a fantastic group thus far," says Bennett.

Since there's still a lot of work to do, Lanrick Jr. Bennett has been working hard to improve cycling conditions in Toronto, and his efforts have been recognized by the community. He has been advocating for more bike lanes（车道）, better lighting, and other safety measures to make cycling a practical option for commuters（通勤者）. It's great to see people like Lanrick

Jr. Bennett working towards making cycling safe and accessible for all residents.