China is a country on the move—especially around its Lunar New Year holiday. This year, the holiday crush（客流量） promises to be even heavier than before.

    Government officials estimate that Chinese people will take to the air, roads and railways 3.62 billion times over a 40-day period around the nation's most important holiday this year as people push their way home for family gatherings or to satisfy their new-found passion for travel.

    Getting tickets to all those would-be travelers is a discounting challenge that annually tries patience. And it is the railway system that routinely is most unable to cope. Railways are the transport of choice for low-cost long-distance travel, and that's where the ticketing system routinely falls down.

    Much of the criticism has, focused on the railway's online purchasing system, which has been unable to keep pace with the huge demand and also failed to stop scalpers（票贩子） from ending up with many of the hard-to-find tickets.

    While insisting that online sales were the fairest way to get tickets for travelers, railway officials told reporters that the public need to be patient. Efforts were being made to provide online identity checks that would reduce the ticket scalping problems. While officials had little good news for rail passengers, they did manage to bring a few smiles to those traveling by car as the country's extremely expensive highway tolls （通行费） will be free of charge for the period of the official holiday.

    Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.

    "I think we are knocking at the door of immortality(永生)," said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that' s a conservative estimate(保守的估计)."

    At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnology(纳米技术) make it likely that humans will live in the future beyond what has been possible in the past. "There is a great effort so that people can live from 120 to 180 years," he said. "Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years."

    However, many scientists who specialize in aging are doubtful about it and say the human body is just not designed to last past about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death.

    Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass 120, you know; could you be healthy enough to have good quality of life?" said Leonard Poon, director of the University of Georgia Gerontology Centre. "At present people who could get to that point are not in good health at all."

    I travel a lot, and I find out different “styles”(风格) of directions every time I ask “How can I get to the post office?”

    Foreign tourists are often confused(困惑) in Japan because most streets there don't have names; In Japan, people use landmarks(地标) in their directions instead of street names. For example, the Japanese will say to travelers, “Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is across from the bus stop.”

    In the countryside of the American Midwest, there are not usually many landmarks. There are no mountains, so the land is very flat; in many places there are no towns or buildings within miles. Instead of landmarks, people will tell you directions and distances. In Kansas or Iowa, for example, people will say, “Go north two miles. Turn east, and then go another mile.”

    People in Los Angeles, California, have no idea of distance on the map; they measure distance in time, not miles. “How far away is the post office?” you ask. “Oh,” they answer, “it's about five minutes from here.” You say, “Yes, but how many miles away is it?” They don't know.

    It's true that a person doesn't know the answer to your question sometimes. What happens in such a situation? A New Yorker might say, “Sorry, I have no idea.” But in Yucatan, Mexico, no one answers “I don't know.” People in Yucatan believe that “I don't know” is impolite. They usually give an answer, often a wrong one. A tourist can get very, very lost in Yucatan!

    While many countries love their tea, UK citizens are particularly proud of being “tea people”. The average UK citizen consumes nearly 2 kilograms of tea each year.

    Tea only made its way to England in large quantities in the first years of the 17^th century. Tea from China and a few other Asian countries was being sold more widely in England at that time. Then tea was getting more and more popular among different social classes.

    There are many varieties of tea. Black tea mixtures are still the most common type drunk in the UK. Black tea is dark in colour, because the leaves have been allowed to oxidize (氧化) before drying. This is why we usually serve it with milk, although it is not uncommon to drink it black or with lemon. You may still find tea made with loose tea leaves, served up in a pot, and poured into the best china cups with saucers (茶托) for visitors.

    Tea is still a large part of daily life in the UK today, but it seems to be on the decrease. The amount of tea sold in the UK fell by more than 10% in the five years leading up to 2002, and has been dropping ever since. Tea sales fell by 6% in 2014 alone, and most restaurants report selling more than twice as many cups of coffee as they do tea. More than ￡1 billion was spent on coffee in high street stores in 2013, more than twice what was spent on tea bags.

    Still, what goes around comes around; it's sure to become fashionable again.

    Hotshot jet pilots are no match for cliff swallows. The birds rocket over bridges and skim over lakes, rushing forward at accelerations that would knock an Air Force. By tracking these contests with high-speed cameras, a new study gives the first, in-depth peek into avian aerodynamics (鸟类空气力学) in the wild. "The findings may even provide insight into how to design better micro air vehicles-tiny drones. This technology will be brilliantly useful," says biomechanics expert Jim Usherwood of the United Kingdom's Royal Veterinary College in Hatfield. "High-resolution field studies like this have never been done before for birds."

    For cliff swallows, the trouble starts when they return from wintering in South America to their summer homes in North America. After arrival, they seek out their old mud nests—usually located under concrete bridges and freeways-and start rebuilding their homes. But rather than hunt down a fresh supply of mud, some swallows prefer stealing supplies from their more hardworking neighbors. Others take things further and will even lay an egg or two in their neighbor's nest before taking off.

    Battles in the air follow if the invaders are caught in the act, and a new study takes advantage of these fights to learn how birds perform high-speed maneuvers (演习). The team placed three cameras along a North Carolina lake crossed by a highway bridge that houses several cliff swallow nests and waited for the battles to commence.

The team was surprised to learn that most of the time, chasers copied the move of fleeing invaders. Swallows also pull very hard turns to escape an enemy, with one extreme case reaching 7.8 gravity. Fighter pilots usually pass out at about 5 or 6 gravity, which is why these experiments have earned interest, and partial funding, from the Office of Naval Research. The Navy may use the findings to build better guidance systems for micro air vehicles. However, the swallows' biomechanics are complex, and now the team is simply trying to collect a few tricks.

Jiyou village in Jianhe county, Qiandongnan Miao and Dong autonomous prefecture, is known by many {#blank#}1{#/blank#} its ancient trees and Miao love songs. With simple folk customs and a forest coverage rate of more than 90 percent, the village is rich in Miao culture, {#blank#}2{#/blank#} was officially listed in the second group of Chinese {#blank#}3{#/blank#}（tradition）villages in August 2013. A grand festival {#blank#}4{#/blank#}（hold）on the second day of the second lunar month—the Bridge Worship Festival. At this time, the ethnic Miao prepare food and wine and perform songs and dances. {#blank#}5{#/blank#}（walk）into Jiyou village during the festival, one can see villagers {#blank#}6{#/blank#}（dress）in Miao costumes. Men hold Lusheng and flags, women carry baskets of wine and food and children are wearing new clothes. All converge（汇集）for the "bridge sacrifice" ceremony and celebrate under the leadership of village {#blank#}7{#/blank#}（elder）. During the day, along with the lilting rhythm of the Lusheng, residents dance {#blank#}8{#/blank#}（joyful）in the square, while tourists take photos and broadcast live {#blank#}9{#/blank#}（record）the moment. At nightfall, villagers and tourists light a bonfire in the center of the square. By {#blank#}10{#/blank#} light of the fire, they savor food and wine and enjoy the general atmosphere of friendship.