When I was a kid, I used to spend hours listening to Adam Carolla and Dr. Drew Pinsky on their Sunday night radio show Loveline. I listened so often that I began to use one of their well-known phrases—"good times"—in my daily conversations. Scientists have a name for this phenomenon: behavioral mimicry.

    You've probably experienced this before: after spending enough time with another person, you might start to pick up on his or her behavior or speech habits. You might even start to develop your friend's habits without realizing it. There is a large body of literature concerning this sort of phenomenon, and it regularly happens for everything from body gesture to accents to drink patterns (模式). For example, one study found that young adults were more likely to drink their drink directly after their same-sex drinking partners, than for the two individuals to drink at their own paces.

And the effect isn't limited to real-life face-to-face activities. Another study found that the same you-drink-then-I-drink pattern held even when watching a movie! In other words, people were more likely to take a drink of their drinks in a theater after watching the actors on the screen enjoy a drink. At least I don't feel so strange anymore, having picked up on Adam Carolla's "good times".

    New research published today in the journal PLOS ONE indicates that the same sort of behavioral mimicry is responsible for social eating, at least among university-age women of normal weight. That's right: the young women were more likely to adjust their eating according to the eating pace of their same-sex dining companion.

As with most experiments, these results raise a whole new set of questions. However, the finding that behavioral mimicry may at least partly explain eating behavior is important, and has real effects on health. The researchers note that "as long as people don't fully recognize such important influences on intake (eating), it will be difficult to make healthy food choices and keep a healthy diet, especially when people are exposed to the eating behavior of others".

The Handshake

    I don't remember the exact date I met Marty for the first time. Like a lot of people who want to get through a checkout line, I found my thoughts on speed, nothing more. The line I was standing in wasn't moving as quickly as I wanted, and I glanced toward the cashier, who was receiving money from customers.

    He was an old man in his sixties. I thought, well, it probably took him a little longer to get the jobs done. For the next few minutes I watched him. He greeted every customer before he began scanning the goods they were purchasing. Sure, his words were the usual, “How's it going?” But he did something different—he actually listened to people. Then he would respond to what they had said and talk with them briefly.

    I thought it was strange, but I guessed I had grown accustomed to people asking me how I was doing simply out of a conversation without thinking. Usually, after a while, you don't give any thought to the question and just say something back quietly.

    This old cashier seemed sincere about wanting to know how people were feeling. Meanwhile, the high-tech cash register rang up their purchases and he announced what they owed. When customers handed money to him, he pushed the appropriate keys, the cash drawer popped open, and he counted out their change.

    Then magic happened.

    He placed the change in his left hand, walked around the counter to the customers, and extended his right hand in an act of friendship. As their hands met, the old cashier looked the customers in the eyes. “I want to thank you for shopping here today,” he told them. “You have a great day. Bye-bye.” The looks on the faces of the customers were priceless.

    Now it was my turn. I glanced down at the name tag on his red waistcoat, the kind experienced Wal-Mart cashier wore. It read, “Marty.”

    Marty told me how much I owed and I handed him some money. The next thing I knew he was standing beside me, offering his right hand and holding my change in his left hand. His kind eyes locked onto mine. Smiling, and with a firm handshake…

    “Sesame Street” has been called “the longest street in the world”. That is because the television program by that name can now be seen in so many parts of the world. That program became one of American's exports soon after it went on the air in New York in 1969.

    In the United States more than six million children watch the program regularly. The viewers include more than half the nation's pre-school children, from every kind of economic, racial, and geographical group.

    Although some educators object to certain elements in the program, parents praise it highly. Many teachers also consider it a great help, though some teachers find that problems arise when first graders who have learned from “Sesame Street” are in the same class with children who have not watched the program.

    Tests have shown that children from all racial, geographical, and economic backgrounds have benefited from watching it. Those who watch it five times a week learn more than occasional（偶然的）viewers. In the US the program is shown at different hours during the week in order to increase the number of children who can watch it regularly.

    The programs all use songs, stories, jokes, and pictures to give children a basic understanding of numbers, letters and human relationships. But there are some differences. For example, the Spanish program, produced in Mexico City, devotes more time to teaching whole words than to teaching separate letters.

    Why has “Sesame Street” been so much more successful than other children's shows? Many reasons have been suggested. People mention the educational theories（理论）of its creators, the support by the government and private（私人的）businesses, and the skillful use of a variety of TV tricks. Perhaps an equally important reason is that mothers watch it along with their children. This is partly because famous adult stars often appear on it. But the best reason for the success of the program may be that it makes every child watching feel able to learn. The child finds himself learning, and he wants to learn more.

    For many years, Bruce Bexler dreamed of going to the lands no human had explored and discovered rare, unknown species. That might sound like an impossible dream, but Bexler turned it into a reality.

    In December 2015, he, together with a team of Australian and American scientists, adventured into a rain forest on the island of New Guinea. They were the first people ever to enter the region. “As we were dropped on the ground by helicopter, we found no trails anywhere; it was really hard to get around,” Bexler says.

    Within minutes of landing, the team spotted a black chicken-like bird. The scientists soon determined that the creature was a type of honeyeater-the first new bird species to be sighted on New Guinea in 60 years. The honeyeater wasn't the only surprise for them. They discovered more than 40 previously unknown plant and animal species. “We were like kids in a candy store?' Bexler recalls. “Everywhere we looked, we saw amazing things we had never seen before.”

    The new found species didn't shy away from the scientists. Two long-nosed echidnas even let the visitors pick them up and take them back to camp to study them. Bexler thinks the animals weren't scared because they had never seen humans before. He explains, “This area gives scientists a place where they can study the behaviours of animals that have not yet learned to be afraid of people.”

    Bexler and his team did not have enough time to study the area completely. “We just scratched the surface, Bexler says. “Anyone who goes there will come back with a mystery.”

    Most of us might only begin to think about dinner in the late afternoon: What should I make today? But Jelena Petrovic begins to think about her big meal early each morning. After morning tea, she and her husband, Milan, begin their plans for a traditional Serbian dish. The cooking method they use probably comes from Jelena's mother or grandmother. Each recipe uses local foods found in Serbian markets.

    Milan goes to the market to get the food they need. And the 69-year-old Jelena makes plans for how she will explain the cooking process to her 150, 000 followers on YouTube. Once she is ready, Jelena films her cooking show from a small kitchen table. Milan holds the camera.

    Jelena has many years of cooking experience at home. Ten years ago, she started an online program, where she shared recipes and cooking suggestions for meat, soup, bread, sweet treats and more.

    Her number of followers grew over time. She decided to start a blog and began also making videos she filmed with her mobile phone. Today, her videos on YouTube have over 50 million views. Last year, "Granny's Kitchen" was named one of the Top 50 YouTube channels in Serbia.

    Now her YouTube channel takes up much of her day. She works from her small kitchen and home office. Colorful plants and flowers fill the room. A bright cloth covers the table where she works. She says she gets tired from cooking long hours each day. But, she said, "My viewers wait for a new recipe every morning. If I am late, they will ask if I am well or what is happening."

    Often, her viewers write that the recipes bring back happy memories of their childhood. "My recipes are all local, traditional home-food recipes," Jelena said. "I make things my mother or grandmother used to make."