1 . Last year, 138,000 San Francisco residents used Airbnb, a popular app designed to connect home renters and travelers. It’s a striking number for a city with a population of about 850,000, and it was enough for Airbnb to win a major victory in local elections, as San Francisco voters struck down (否决) a debatable rule that would have placed time restrictions and other regulations on short-term rental services.

The company of Airbnb fiercely opposed the rule, Proposition F. It also contacted its San Franciscan users with messages urging them to vote against Proposition F.

Most people think of Airbnb as a kind of couch-surfing app. The service works for one-night stays on road trips and longer stays in cities, and it often has more competitive pricing than hotels. It’s a textbook example of the “sharing economy”, but not everyone is a fan.

The app has had unintended consequences in San Francisco. As the San Francisco Chronicle reported last year, a significant amount of renting on Airbnb is not in line with the company’s image. Middle-class families rent a spare room out to help make ends meet. Backers of Proposition F argued that this trend takes spaces off the conventional (传统的), better-regulated (监管更好的) housing market and contributes to rising costs.

San Francisco is in the middle of a long-term, deeply rooted housing crisis that has seen the cost of living explode. Located on a narrow land overlooking the bay, San Francisco simply doesn’t have enough space to accommodate the massive inflow of young, high-salaried tech employees flocking to Silicon Valley. Consequently, the average monthly rent for an apartment is around $4,000.

As the Los Angeles Times reported, some San Francisco residents supported the rule simply because it seemed like a way to check a big corporation. Opponents of Proposition F countered that the housing crisis runs much deeper, and that passing the rule would have discouraged a popular service while doing little to solve the city’s existing problems.

2 . For people suffering from depression, there’s an all-natural treatment they should use — getting more exercise. It could help fight depression, even if people have a genetic risk, new research shows.

For the study, researchers collected information from nearly 8,000 people and found those with related genes were more likely to have depression over the next two years after examining them. But that was less likely for people who were more active at the study’s start, even if they had a family history of depression. Higher levels of physical activity helped protect even those with the highest genetic risk of depression.

Both high-intensity (高强度) exercise and low-intensity activities were associated with a reduced risk of depression. Adding four hours of exercise a week could lower the risk of a new episode (一段经历) of depression by 17%, according to the study. “Our findings strongly suggest that, when it comes to depression, being physically active has the potential to remove the added risk of future episodes in individuals who are genetically risky,” said lead author Karmel Choi. “On average, about 35 additional minutes of physical activity each day may help people to reduce their risk and protect against future depression episodes.”

Depression is a common mental illness globally, with more than 264 million people affected. “Depression is so ubiquitous, and that underlines the need for effective approaches that can impact as many people as possible,” Choi said. And mental health and primary care providers can use the findings to advise patients that there’s something meaningful they can do to lower their risk of depression.

3 . What makes people so special? Tool use, self-consciousness, language, and culture are high on the list, but in fact all of these characteristics can be found elsewhere in the animal kingdom. Humans and apes are close relatives, so it is perhaps not surprising that chimpanzees use tools or that gorillas (大猩猩) have a sense of fair play, even rejecting carrots (which they normally accept) when they see their neighbors getting grapes. But the qualities that we often think of as uniquely human exist not just on land, but in the ocean as well.

Among the invertebrates, octopuses (八爪鱼) are known for their intelligence, even exhibiting evidence of playfulness, tool use, and personality. But these skilled predators live alone and consequently lack culture. Dolphins, on the other hand, are large-brained, long-living, social- group-based predators, and it is here that we find the greatest similarity to human-like culture and awareness.

Culture depends on the ability of animals to pass on things they have learned to others. Many animals have culture in this sense, but what sets dolphins apart is what they pass on. Some bottlenose dolphins hold sponges in their mouths that they use as tools to sweep for fish hiding on the ocean floor. This ability is handed down through generations (especially in females), with some families — grandmother, mother, and daughter — all feeding in this highly specialized way.

Another characteristic that dolphins share with humans is their ability to recognize themselves in a mirror. When facing a mirror, most animals behave as though they are interacting with another individual. Even in humans, the ability to recognize that the image in a mirror is oneself does not occur before the age of 18 months. Dolphins not only recognize themselves, but if a black mark is put on the body of a dolphin, it will spend extra time at the mirror to look at the mark.

8 . What a day! I started my new school this morning and had the best time. I made lots of new friends and really liked my teachers. I was nervous the night before, but I had no reason to be. Everyone was so friendly and polite. They made me feel at ease. It was like I’d been at the school for a hundred years!

The day started very early at 7:00 am. I had my breakfast downstairs with my mom. She could tell that I was very nervous. Mom kept asking me what was wrong. She told me I had nothing to worry about and that everyone was going to love me. If they didn’t love me, mom said to have a good talk with them. I couldn’t stop laughing.

My mom dropped me off at the school gate about five minutes before the bell rang. A little blonde girl got dropped off at the same time and started waving (招手) at me. She ran over and told me her name was Abigail. She was very nice and we became close straight away. We spent all morning together and began to talk to another girl called Stacey. The three of us sat together in class all day and we even made our way home together! It went so quickly. Our teacher told us that tomorrow we would really start learning and developing new skills.

I cannot wait until tomorrow and feel as though I am really going to enjoy my time at my new school. I only hope that my new friends feel the same way, too.

9 . Different ways have been applied to dealing with waste paper, specifically used newspapers. Some people put them in the recycling area, while others keep them as wrappers (包装纸). While these are both good measures, a Japanese publishing company had a better idea for their end use.

The Mainichi Newspapers Co., Ltd. invented the “Green Newspaper”, which allows people to grow plants with it. This unique newspaper was published on Greenery Day, which is focused on environmental news and made of green paper with seeds placed into it. What makes it even more special is the ink (油墨) used to print words and photos, which is made from plants. The publisher advises readers to tear the used newspaper into small pieces and plant them in a container with soil. They should water them, like they would do for any plant. Within a few weeks, the seeds will grow into plants.

This brilliant concept was invented by Dentsu Inc., one of Japan’s most famous advertising companies, which works with the publishing company on the initiative (倡议). The publisher’s belief is environmental sustainability (持续性). As its mission statement says, “The Mainichi doesn’t take action only through information, but also by solving global issues.” With joint efforts, this initiative has reached the corners of Japan and sold around millions of copies daily. Other such initiatives producing plantable paper are also seen in India and the US.

About 95 million trees are lost for producing newspapers every year. The Internet, the number of whose users stands for 62.5 percent of the population worldwide, has influenced how people read news and the print readership has dropped greatly. However, the reinvention and reimagination of this newspaper will bring about a change in the publishing industry as well as having an environmental influence.

10 . One evening, Paul O’Sullivan felt bored in his Baltimore apartment. So he got on to Facebook to find out just how many others on the social network ___________ his name. Moments later, dozens of Paul O’Sullivans from around the world filled his ___________. The then-27-year-old employee sent friend requests to them all.

Many of his fellow Paul O’Sullivans ___________ him, but a few felt too curious to ___________ his invitation. Paul O’Sullivan from Rotterdam in the Netherlands says, “My first ___________ was ‘Who is this guy and what does he want from me?’ So I thought about it for a while.” Ultimately, he couldn’t resist the___________ friend request. As Baltimore Paul scrolled through the profiles of the Paul O’Sullivans who accepted his invitation, he noticed something four of them have in common: They were all ___________ . Wouldn’t it be funny if they ___________a band called The Paul O’Sullivans? The other Pauls all ___________ and they created a sort of musical assembly line. They managed to ____________ its first original song, “Namesake,” in March. It’s a passionate track about long-distance relationships. Not romantic ones, of course, but like the friendships they had____________developed.

But just months later, Baltimore Paul began experiencing health issues that ______________ him to take time off from making music. The other Pauls didn’t ______________their friendship. To make sure Baltimore Paul never felt alone, the other Pauls chatted live on Instagram, and checked in on Baltimore Paul and on one another.

“What are the odds (机率)” says Baltimore Paul, “that a random Facebook ______________ would lead not only to new music but to ______________ as well? Some things are just meant to be.”