A good joke can be the hardest thing to understand when studying a foreign language. As a recent article in The Guardian newspaper noted, “There's more to understanding a joke in a foreign language than understanding vocabulary and grammar.”

    Being able to understand local jokes is often seen as an unbelievable ice-breaker for a language learner eager to form friendships with native speakers. “I always felt that humor was a ceiling that I could never break through,” Hannah Ashley, a public relations account manager in London, who once studied Spanish in Madrid, told The Guardian, “I could never speak to people on the same level as I would speak to a native English speaker. I almost came across as quite a boring person because all I could talk about was facts.”

    In fact, most of the time, jokes are only funny for people who share a cultural background or understand humor in the same way. Chinese-American comedian Joe Wong found this out first-hand. He had achieved huge success in the US, but when he returned to China in 2008 for his first live show in Beijing, he discovered that people didn't think his. Chinese jokes were as funny as his English ones.

    In Australia, meanwhile many foreigners find understanding jokes about sports to be the biggest headache. “The hardest jokes are related to rugby because I know nothing about rugby,” said Melody Cao, who was once a student in Australia. “When I heard jokes I didn't get, I just laughed along.”

    In the other two major English-speaking countries, the sense of humor is also different. British comedian Simon Pegg believes that while British people use irony (反话)—basically, saying something they don't mean to make a joke—every day, people in the US don't see the point of using it so often. “British jokes tend to be more subtle and dark, while American jokes are more obvious with their meanings, a bit like Americans themselves,” he wrote in The Guardian.

    In a natural disaster: a hurricane, flood, volcanic eruption, or other catastrophes. Minutes and even seconds of warning can make the difference between life and death. Because of this, scientists are working to use the latest technological advances to predict when and where disasters will happen. They are also studying how best to analyze and communicate this information once it is obtained.

    On September 29,1998, Hurricane Georges made landfall in Biloxi, Mississippi, after damaging Haiti, the Dominican Republic, Puerto Rico, and several islands of the Caribbean badly with heavy rains and winds up to 160 km per hour. Few people lost their lives along the Gulf Coast of the United States, although hundreds died in the Caribbean. This was a very different result, when a powerful Gulf Coast hurricane made an unexpected direct hit on Galveston, Texas, killing at least 6,000 people. Vastly improved hurricane warnings explain the different circumstances at either end of the 20th century—residents of Galveston had no advance warning that a storm was approaching, while residents of Biloxi had been warned days in advance, allowing for extensive safety precautions (预防).

    At the same time that people in Biloxi were thankful for the advance warning, some residents of New Orleans, Louisiana were less satisfied. A day before Georges made landfall, forecasters were predicting that the hurricane had a good chance of striking New Orleans. Emergency management officials must begin evacuations (疏散) well before a storm strikes. But evacuation costs money. The mayor of New Orleans estimated that his city's preparations for Georges cost more than 50 million. After Georges missed New Orleans, some residents questioned the value of the hurricane forecasts in the face of such high costs.

    The different views on the early warnings for Hurricane Georges show some of the complexities (复杂) related to predicting disasters. Disaster prediction is a process of providing scientific information to the government officials and other decision makers who must respond to those predictions.

    Kathy Fletcher and David Simpson have a son named Santi. He had a friend who sometimes went to school hungry. So Santi invited him to occasionally eat and sleep at his house.

    That friend had a friend and that friend had a friend, and now when you go to dinner at Kathy and David's house on Thursday night there might be 15 to 20 teenagers gathering around the table, and later there will be groups of them crashing in the basement or in the few small bedrooms upstairs. The kids who show up at Kathy and David's have suffered the pains of modern poverty: homelessness, hunger, abuse.

    And yet by some miracle, hostile soil has produced beautiful flowers. Kids come from around the city. Spicy chicken and black rice are served. Cellphones are banned. The kids who call Kathy and David “Momma” and “Dad,” are polite and clear the dishes. Birthdays and graduations are celebrated. Songs are performed. Each meal we go around the table and everybody has to say something nobody else knows about them. Each meal the kids show their promise to care for one another.

    The adults in this community give the kids the chance to present their gifts. “At my first dinner, Edd read a poem that I first thought was from Langston Hughes, but it turned out to be his own. Kesari has a voice that somehow appeared from New Orleans jazz from the 1920s. Madeline and Thalya practice friendship as if it were the highest art form.”

    “They give us a gift — complete intolerance of social distance. When I first met Edd, I held out my hand to shake his. He looked at it and said, 'We hug here,' and we've been hugging since.”

    Bill Milliken, a veteran youth activist, is often asked which programs turn around kids' lives. “I still haven't seen one program change one kid's life,” he says. “What changes people is relationships. Somebody is willing to walk through the shadow of the valley of adolescence with them.” Souls are not saved in packs. Love is the necessary force.

    A 27-year-old inventor, Joco Paulo Lammoglia, has come up with a new device named the AIRE mask, which is capable of converting the wind energy provided by the wearer's breath into electrical energy. This means breathing has become a source of renewable energy. The inspiration for the invention came from his watching children blowing on pinwheels (纸风车).

    The device is worn like a mask equipped with tiny wind turbines (涡轮) and it can work its magic even while people are sleeping, jogging or hanging around, since energy is created from one's breath. The principle of this AIRE mask is simple. The invention uses the wind flow created by breathing and changes it into energy that can charge mobile phones and iPods. Simply put this mask connected to your mobile phone on your face. The rest takes place naturally through your breath that provides power to run turbines which produce electricity.

    Lammoglia explained how useful he hopes the AIRE will become. He said, "I hope to bring the concept into production and reduce the carbon footprint. It can be used indoors or outdoors, while you're sleeping, walking, running or even reading books." Apart from saving energy and contributing to environmental protection, it also encourages the practice of physical exercise. This is an entirely all time renewable energy source. Its energy is available 24 hours a day, seven days a week.

    Lammoglia explained why he thought the AIRE was so useful, saying, "Though many of our modern devices offer benefits, they tend to consume a high amount of electrical energy. This may cause problems for the environment, especially if the energy used by these devices is obtained from non-renewable sources.

    The AIRE mask will be future's cheaper source of charging mobile phones. It would save energy and allow people to never have to worry about their phone dying unless they stop breathing.

    The siesta competition took place in a supermarket, with plenty of shoppers, screaming babies, talking voices, and footsteps to take the competitors' attention away from their after lunch sleeps.

    Five bright blue sofas were laid out, and five competitors at a time were allowed to take a 20-minute sleep. A doctor measured their pulse to time how long they actually spent on asleep. Competitors earned extra points for snoring (打鼾), sleeping in strange positions, or wearing silly pajamas (睡衣). The winners of each round advance to the next stage in the competition.

    It's amazing that any of those people would fall asleep in the middle of such a busy place, while on couches that they are not used to. Yet, many of them did. They hugged pillows or soft toy bears. They covered their eyes with sleep masks, too. Whatever it took to help them fall asleep fast and stay asleep.

    The siesta is a tradition in Spain that many feel is becoming forgotten. It used to be that people would take a brief nap after lunch every day. This would energize them, and keep them going for the rest of the day. Not to mention the health benefits of a good nap. But, that's all changing. People are too busy making money or watching gossip shows on TV after lunch to care about taking a nap.

    The National Association of Friends of the Siesta wants to bring Spain back to their traditional roots. They are doing this by having the siesta competition. They set up the competition to reward the best sleepers with money. Actually, they were paid to sleep.

    There are really health benefits to a midday nap. We could all learn from this tradition. It's a much better way to get more energy than drinking a cup of coffee. It is also believed that a nap, and in fact a good night's sleep, can help reduce heart disease. The more rested we are, the less stress we feel with day-to-day life.