I look back sometimes at the person I was before I rediscovered my old professor. I want to talk to that person. I want to tell him what to look out for, what mistakes to avoid. I want to tell him to be more open, to ignore the temptation of advertised values, to pay attention when your loved ones are speaking, as if it were the last time you might hear them.

    Mostly I want to tell that person to get on an airplane and visit a gentle old man in West Newton, Massachusetts, sooner rather than later, before that old man gets sick and loses his ability to dance.

    I know I cannot do this. None of us can undo what we've done, or relive a life already recorded. But if Professor Morrie Schwartz taught me anything at all, it was this: there is no such thing as “too late” in life. He was changing until the day he said good-bye.

    Not long after Morrie's death, I reached my brother in Spain. We had a long talk. I told him I respected his distance, and that all I wanted was to be in touch—in the present, not just the past—to hold him in my life as much as he could let me.

    “You're my only brother,” I said. “I don't want to lose you. I love you.”

    I had never said such a thing to him before. A few days later, I received a message on my fax machine. It was typed in the sprawling, poorly punctuated, all-cap-letters fashion that always characterized my brother's words.

    “HI I'VE JOINED THE NINETIES!” it began. He wrote a few little stories, what he'd been doing that week, a couple of jokes. At the end, he signed off this way:

I HAVE HEARTBURN AND DIAHREA(腹泻) AT THE MOMENT—LIFE'S A BITCH. CHAT LATER?

[signed] SORE TUSH.

I laughed until there were tears in my eyes.

    This book was largely Morrie's idea. He called it our “final thesis.” Like the best of work projects, it brought us closer together, and Morrie was delighted when several publishers expressed interest, even though he died before meeting any of them. The advance money helped pay Morrie's enormous medical bills, and for that we were both grateful.

    The title, by the way, we came up with one day in Morrie's office. He liked naming things. He had several ideas. But when I said, “How about Tuesdays with Morrie?” he smiled in an almost blushing way, and I knew that was it.

    After Morrie died, I went through boxes of old college material. And I discovered a final paper I had written for one of his classes. It was twenty years old now. On the front page were my penciled comments scribbled to Morrie, and beneath them were his comments scribbled back.

    Mine began, “Dear Coach . . .”

    His began, “Dear Player . . .”

    For some reason, each time I read that, I miss him more.

    Have you ever really had a teacher? One who saw you as a raw but precious thing, a jewel that, with wisdom, could be polished to a proud shine? If you are lucky enough to find your way to such teachers, you will always find your way back. Sometimes it is only in your head. Sometimes it is right alongside their beds.

    The last class of my old professor's life took place once a week, in his home, by a window in his study where he could watch a small hibiscus(木槿) plant shed its pink flowers. The class met on Tuesdays. No books were required. The subject was the meaning of life. It was taught from experience.

    The teaching goes on.

    What makes a building ugly? Everyone's got their own opinion, so it's hard to say. Now, let's take a look at some of the world's worst buildings.

    The Torre Velasca

    The Tone Velasca in Milan is in the centre of Milan (Italy). The tower, which went up in the 1950s, is about 100 metres tall. Its design is actually a modern representation of a traditional Lombard castle, where the lower parts were narrower (狭窄的）than the upper parts.

    The Mirador Building

    The Mirador Building in Madrid (Spain) was created by Dutch studio MVRDV and the Spanish architect Blanca Lleo. The building, which is a block of flats, opened in 2005. There is a large rectangular (矩形的）hole in the upper part of it, which is used by the neighbourhood as a meeting area and playground.

    The Prague TV Tower

    The Prague TV Tower is in Prague (the capital of the Czech Republic). It stands 216 metres high and looks a bit like a tall, thin space ship. Prague is famous for its architectural beauty,so when the tower was put up in 1985 by architect Vaclav Aulicky and engineer Jiri Kozak, many felt it didn't fit in.

    The Longaberger Basket Company

    The Longaberger Basket Company building is in Newark, Ohio (USA). The office block was opened in 1997 and looks like a very large basket. It，s got seven floors and two handles at the top. The handles weigh about 150 tons. It may not be the ugliest building in the world but it's certainly one of the most unusual.

    Many years ago, when I was fresh out of school and working in Denver, I was driving to my parents' home in Missouri for Christmas. I stopped at a gas station about 50 miles from Oklahoma City, where I was planning to stop and visit a friend. While I was standing in line at the cash register (收款台), I said hello to an older couple who were also paying for gas.

    I took off, but had gone only a few miles when black smoke poured from the back of my car. I stopped and wondered what I should do. A car pulled up behind me. It was the couple I had spoken to at the gas station. They said they would take me to my friend's. We chatted on the way into the city, and when I got out of the car, the husband gave me his business card.

    I wrote him and his wife a thank­you note for helping me. Soon afterward, I received a Christmas present from them. Their note that came with it said that helping me had made their holidays meaningful.

    Years later, I drove to a meeting in a nearby town in the morning. In late afternoon I returned to my car and found that I'd left the lights on all day, and the battery (电池) was dead. Then I noticed that the Friendly Ford dealership—a shop selling cars—was right next door. I walked over and found two salesmen in the showroom.

    “Just how friendly is Friendly Ford?” I asked and explained my trouble. They quickly drove a pickup truck to my car and started it. They would accept no payment, so when I got home, I wrote them a note to say thanks. I received a letter back from one of the salesmen. No one had ever taken the time to write him and say thank you, and it meant a lot, he said.

    “Thank you” — two powerful words. They're easy to say and mean so much.

    Youth football team members rescued more than two weeks after sudden flooding trapped them in a cave in Thailand are now being well looked after at a hospital in the northern city of Chiang Rai. In addition to treating the boys for potential body fluid loss, inadequate nutrition and lack of oxygen, their doctors also plan to closely monitor them for symptoms of diseases that may have been infected by animals living in the cave.

    "The next step is to make sure those kids and their families are safe, because living in a cave provides a different environment, which might contain animals that could transmit…disease," said the local hospital. The boys and their family members have been told to watch for symptoms such as headache, nausea(反胃), muscle pain or difficulty breathing, the reports added.

    Yet based on the location where the boys were trapped—more than four kilometers from the cave complex's main entrance, past some fully submerged passages—and the fact they have been swimming out wearing full scuba face masks, it seems unlikely that they were living with bats in the cave or breathed in bat-associated bacteria during their rescue, several infectious disease experts said. "It's hard to imagine bats got that deep into the cave because of all those narrow passageways, but it is possible," says Ian Lipkin, an animal expert and professor at the Mailman School of Public Health at Columbia University. "It's unlikely that there would be many animals in there," notes Jonathan Epstein, a doctor at EcoHealth Alliance, a nonprofit organization that studies diseases and how to prevent them. Bats typically like to rest in areas they can easily enter and exit, not in places that fully flood, he adds.

    Bats in Thailand have been linked with a wide range of viruses that are similar to severe acute respiratory syndrome (SARS)—Lipkin says. But it seems more likely the boys would have been exposed to infection-causing bacteria when they swam through the dirty water with cuts and scrapes. "If you are trying to prioritize issues with respect to health care for these kids, number one would be psychological damage and second will be bacterial infections from the cuts and scrapes they may have encountered." Lipkin says.

    Liana nervously bit her nails while she waited for the exam to arrive. She looked around the room; hundreds of other law students sat in rows staring anxiously at the tables in front of them. Just as she began to take a deep breath to calm her anxiety, an exam booklet(册子) was placed in front of her. This was the moment she had been expecting ever since she began law school three years ago. She picked up her pencil, and opened to the first page of the bar exam, a test for all students wanting to become licensed lawyers.

    Liana never thought she would want to become a lawyer. Her parents were both artists. Law was something she had not been exposed to as a child. But art made for a tumultuous career—both of her parents had struggled to find jobs and worked round the clock when they were young. Even though they finally seemed successful and happy, Liana wanted something different.

    She was the anchor on her high school debate team, and consistently impressed her competitors with her analytical thinking. "Never argue with Ms. Lakes," her teachers would say. So she chose to major in law. In her mind, she pictured herself in a New York City courtroom(法庭) dressed in an expensive suit, with papers in her hand, waving at the jury(陪审团) in a speech on human rights.

    But now, with the bar exam sitting in front of her, she started to worry. "What if I don't pass? Did I study enough?" Her thoughts raced through her mind. On the first page were seven paragraphs detailing a law situation followed by a series of questions. Liana read through the paragraphs, and quickly scribbled down an explanation of the first question before moving onto the next question. The next few hours went like this as the clock ticked closer and closer to the lunch hour.

    At 12:00 p.m. sharp, a buzzer(蜂鸣器) sounded and everyone was told to put down their pencils and walked out for an hour-long lunch break. At lunch, Liana met her friend, Kevin.

    "How did it go?" she asked. "To be honest, I've no idea. I just kept writing." Kevin said. Liana laughed and said she felt the same way.

    After lunch, the two exchanged words of encouragement. They strolled back into the exam center a bit more refreshed. Liana finished the second half of the exam that day with a better feeling than what she started with in the morning.

    People have grown taller over the last century, with South Korean women shooting up by more than 20cm on average, and Iranian men gaining 16.5cm. A global study looked at the average height of 18-year-olds in 200 countries 1914 and 2014. The results show that while Swedes were the tallest people in the world in 1914, Dutch men have risen from l2th place to claim top spot with an average height of 182.5cm. Larvian women, meanwhile, rose from 28th place in 1914 to become the tallest in the world a century later, with an average height of 169.8cm. James Bentham, a co-author of the research says the global trend is likely but once you average over whole populations, genetics plays a less key role," he added.

    But while height has increased around the world, the trend in many countries of north and sub-Saharan Africa causes concern, says Elio Riboli of Imperial College. While height increased in Uganda and Niger during the early 20th century, the trend has reversed in recent years, with height decreasing among 18-year-olds.

    "One reason for these decreases in height is the economic situation in the 1980s," said Professor Alexander. The nutritional and health problems that followed the policy of structural adjustment, he says, led to many children and teenagers failing to reach their full potential in terms of height.

    Bentham believes the global trend of increasing height has important implications. "How tall we are now is strongly influenced by the environment we grew up in," he said. "If we give children the best possible start in life now, they will be healthier and more productive for decades to come."