Mark is always engaged in his work. But this time he felt that it was time for him to take part in his community, so he went to the neighborhood meeting after work. The area city council woman was leading a discussion about how the quality of life was on the decline. The neighborhood faced many problems. Mark looked at the charts taped to the walls. There were charts for parking problems, crime, and for problems in empty buildings. Mark read from the charts, “Police patrols cut back, illegal parking up 20%”. People were supposed to suggest solutions to the council woman. It was too much for Mark. “The problems are too big”, he thought. He turned to the man next to him and said, “I think this is a waste of my time. Nothing I can do would make a difference here.”

    As he neared the bus stop on his way home, Mark saw a woman carrying a grocery bag, and a baby. As Mark got closer, her other child, a little boy, suddenly ran into the street. The woman tried to reach for him, but as she moved, her bag shifted, and groceries started to fall out. Mark ran to take the boy's arm and led him back to his mother. “You gotta stay with mom,” he said. Then he picked up the stray groceries while and the woman smiled in relief. “Thanks,” she said, “You've got great timing.” “Just being neighborly,” Mark said. As he rode home, he glanced at the walls of bus. On one of them was “Small acts of kindness add up.” Mark smiled and thought, “Maybe that's a good place to start.”

New York Walking Tour

    Statue of Liberty and Ellis Island Walking Tour

    Start this exciting guided 4-hour tour by getting early Reserve Line Access boarding on the ferry to Liberty Island. Once there, go inside the base of the statue and head to the observation decks for an awesome view of New York City and its surroundings. Then come back on the ferry to Ellis Island to learn about the history of immigration(移民)to America that took place here between 1892 and 1954.

    Central Park Walking Tour

    Walk through Central Park's most picturesque highlights on a 2-hour tour with a professional photographer. Remember your New York City adventure with unforgettable images of you with family or friends as you circle the towers at Belvedere Castle, walk through paths with flowers in the Conservatory Garden, or feed the swans by the Loeb Boathouse.

    New York City Architecture Walking Tour

    Learn about the history of the buildings that define the New York City skyline on a 3-hour walking architecture tour. Walk down the famous 42nd Street corridor with a longtime New York resident(居民)and architectural expert, stopping along the way to learn about Midtown Manhattan's most iconic structures like the Chrysler Building, Ford Foundation, Grand Central Station and the New York Public Library.

    Greenwich Village Walking Tour

    Greenwich Village is one of New York City's most beautiful and famous neighborhoods. Take a guided 2-hour walking tour of this legendary Lower Manhattan space. Hear about the famous artists who once lived here, from Edgar Allan Poe to Bob Dylan, Jimi Hendrix and countless others. Walk the winding streets and visit popular Washington Square Park, reliving more than 200 years of history.

    A week ago at Compton Elementary School, Georgia, something wonderful happened. Band students from Hillgrove High School arrived to hang out with and talk to the little guys. They wanted to make sure the school's youngest had food in their homes that week.

    The thing that thrilled people was that this generous idea came from 17-year-old Nathan Jones, not an adult. Jones is a good trumpet (小号) player with the Hillgrove Hawks band. The idea, he said, came to him two years ago during a discussion about community service in a freshman leadership class. Serving the community was nothing new to Jones. For years, he and his family, who recently moved from Orlando, Florida, had been active community volunteers.

    Last year, Jones thought it was a good idea to get the school band involved in community service, only for the young kids in the school. Band director Patrick

    Erwin agreed but decided they had neither the time nor the resources to do it. "It got put on the back burner," Jones said. "This year, I decided to try again." This time, Erwin encouraged Jones to take charge and he did.

    Back in August, Jones challenged the band to raise $5, 000 to help with the cost of packing the meals. Within two weeks, they'd collected $6, 000 in donations, enough to provide 2,500 family meals, including bags of rice, soy protein, vitamins and vegetables. By the end of the month, when poor families are struggling, a bag of food can mean the difference between a full stomach and an empty one for many of those students.

    But HiHgrove's effort isn't just about feeding the body. It's about feeding souls, too.

    Early on, the band's goal was to direct students' focus from getting "likes" on social media to building relationships with the people around them. So the band decided on the message, "What the world needs now is love, not likes" for its half-time show.

    "That means actually going into the community and actually showing love," Jones said. "We're going out and doing what we're telling people to do."

Father's Day is celebrated today in 75 countries around the world. In my personal world, it's a day I like to think of my father's father.

I learned a lot in my later life from my dad. But I learned something else, as a kid not even yet in school, from my grandfather. I learned to be curious. Little things fathers and grandfathers do can change the life of a child forever. In my case, this change came from necessity：My mom needed someone to look after little Allen, barely 4 years old, during the school day. My grandmother volunteered, and my grandfather came up with a way I could be watched while he worked in his clockmaker's shop.

He seated me on a chair every day while I was there, right in front of his big workbench.  He told me stories. He had a great sense of humor and a funny way of making a "buh﹣buh﹣buh" sound when he sensed my attention was weakening, and he encouraged me to ask questions about anything he was doing.

Naturally, I was usually asking questions about clocks﹣what made the hands move, what the pendulum (钟摆) did, why you had to stop winding just before the weight hit the stop.  Sometimes I just asked about which shiny parts went where.

Most of all, he showed me how clocks worked. He treated me as if I were a sort of small grown﹣up. He never talked down to me, never told me I was "too young to understand".

And so my grandfather granted me two things: A love of clocks, and an everlasting curiosity.

As a journalist, I turned that fascination into explanations of why computers and software do what they do﹣﹣and, perhaps even more importantly, why they fail at that task. I haven't been afraid of opening up the innards and looking for what is wrong with the computer.

A group of small, waggling (扭动) robots that communicate by flashing lights can make collective decisions. This is similar to the process bees use to reach an agreement on where to build their nest.

"We believe that in the near future there are going to be simple robots that will do jobs that we don't want to do, and it will be very important that they make decisions on their own," says Carmen Miguel at the University of Barcelona in Spain. She and her team tested how copying bees might help with that.

When bees go house-hunting, they communicate their preferred locations through a "waggle dance". The more a bee recommends one location, the longer and harder it waggles. Eventually other bees join them, and they reach an agreement when a majority are waggling together. Researchers previously translated this behavior into a mathematical model, and Miguel and her colleagues used it to program decision-making rules into small robots called kilobots.

Each kilobot with three thin legs had an infrared-light emitter (红外线发射器) and receiver, and a colored LED light. Within a group, kilobots could move around, turn clockwise or anticlockwise and use infrared signals to exchange information.

Ezequiel Ferrero at the University of Barcelona says that across all the experiments, kilobots reached an agreement within about half an hour, even when they didn't have many immediate neighbors to communicate with. He says that getting the right combination of how long they spend transmitting their message and how much they walk around allowed them to make a collective decision in the end.

The message is drummed into us from childhood: forgive people who've wronged you, because it's the right thing to do. Forgiveness is a virtue, we're told—the only way for us to truly move on and heal, freed from the baggage of bearing ill will.

However, I'm not buying it. Forgiving someone can indeed be a beautiful thing, but it's not always what's best for us. In fact, if someone has hurt you deeply and the relationship isn't healthy, trying to "fix" things can do more harm than good.

Most of us would probably agree that forgiving a wrongdoer means letting go of negative feelings—like anger and resentment—towards them, as if nothing happened. Actually this isn't helpful. It pressures us to minimize our feelings—to say "it's OK" when for us, it isn't. While it's not a good idea to focus on negative thoughts, recognizing and processing all of that pain is an important part of the healing journey.

A 2010 research paper published in the Journal of Personality and Social Psychology found that folks who forgave partners that didn't make them feel valued had less respect for themselves. Letting minor offences（冒犯） that happen now and again slide can be great for any relationship, but repeatedly forgiving bad behavior can encourage that person to keep hurting you.

At least, that's what 2011 research by psychology professor James McNulty argues. He found that when a partner was more likely to forgive those acts, the aggressor was more likely to keep committing them. McNulty suggests that this is because facing the consequences of their actions is what motivates people to change their ways, and being offered a clean slate can be a kind of pass to avoid making changes. So forgiving frequent and major offences, like verbal or physical abuse, can do more harm than good.

For me, this speaks to the core tension in the idea. Instead of looking to forgiveness like a magic medicine, we can focus on recognizing what happened and coming to terms with it, however that looks for us and without any sense of obligation towards our offender.