When another old cave is discovered in the south of France, it is not usually news. Rather, it is an ordinary event. Such discoveries are so frequent these days that hardly anybody pays heed to them. However, when the Lascaux cave complex was discovered in 1940, the world was amazed. Painted directly on its walls were hundreds of scenes showing how people lived thousands of years ago. The scenes show people hunting animals, such as bison or wild cats. Other images depict birds and, most noticeably, horses, which appear in more than 300 wall images, by far outnumbering all other animals.

    Early artists drawing these animals achieved a monumental and difficult task. They did not limit themselves to the easily accessible walls but carried their painting materials to spaces that required climbing steep walls or going on hands and knees into narrow passages in the Lascaux complex.

    Unfortunately, the paintings have been exposed to the destructive action of water and temperature changes, which easily wear the images away. Because the Lascaux caves have many entrances, air movement has also damaged the images inside.

    Although they are not out in the open air, where natural light would have destroyed them long ago, many of the images have deteriorated and are hardly recognizable. To prevent further damage, the site was closed to tourists in 1963, 23 years after it was discovered.

    My grandfather came from Hungary and was the only one in his family who settled down in the United States. The rest of his family remained in Europe. When World War I broke out, he seemed to have become another man, downhearted. Such obvious change was not born out of concern for his welfare, but out of fear: if his only son, my uncle, had to go to war, it would be cousin fighting against cousin.

    One day in 1918, my Uncle Milton received his draft notice. My grandparents were very upset. But my mother, at the age of 10, felt on top of the world about her soldier brother going off of war. Realizing how he was regarded by his little sister and all of her friends, my uncle bought them all service pins, which meant that they had a loved one in the service. All the little girls were delighted.

    The moment came when my uncle and the other soldiers, without any training but all in uniforms, boarded the train. “The band played and the crowd cheered. Although no one noticed, I'm sure my grandmother had a tear in her eye for the only son. The train slowly pulled out, but not about a thousand yards when it suddenly paused. Everyone stared in wonder as the train slowly returned to the station. There was a dead silence before the doors opened and the men started to step out. Someone shouted, “The war is over!”For a moment, nobody moved, but then the people heard someone bark orders at the soldiers. The men lined up in two lines, walked down the steps, and with the band playing, marched down the street, as returning heroes, to be welcomed home. My mother said it was a great day, but she was just a little disappointed that it didn't last a tiny bit longer.

    Making decisions when shopping is often tough. Even if you're satisfied with the first dress you try on, would you go on looking for alternatives, comparing styles and prices, until you drop dead?

    According to a recent Wall Street Journal column, psychology researchers have studied how people make decisions and concluded there are two basic styles.“Maximizers” are people who want the best. They like to take their time and weigh a wide range of options—sometimes every possible one—before choosing.“Satisfiers” would rather be fast than thorough. They are people who want to be good enough.

    Schwartz and his colleagues followed 548 job-seeking college seniors at 11 schools from October through their graduation in June. They found that the maximizers landed better jobs. Their starting salaries were, on average, 20 percent higher than those of the satisfiers, but they felt worse about their jobs.

    There is no right choice.“The maximizer is kicking himself because he can't examine every option and at some point had to just pick something,” Schwartz says.“Maximizers make good decisions and end up feeling bad about them. Satisfiers make good decisions and end up feeling good. ”

    Faced with so many choices in our lives, we need to learn how not to waste time and energy on our decision-making, says Jane C. Hu in Slate online magazine.Hu suggests, decrease your range of options. Once you've arrived at a decision, stick with it. Just accept that no decision is ever completely perfect, and remind yourself that it is the best you can do at the moment.

    If cars had wings, they could fly and that just might happen, beginning in 2012.The company Terrafugia, based in Woburn, Massachusetts, says it plans to deliver its car­plane, the Transition, to customers by the end of 2012.

    "It's the next 'wow' vehicle, "said Terrafugia vice president Richard Gersh. "Anybody can buy a Ferrari, but as we say, Ferraris don't fly."

    The car plane has wings that unfold for flying—a process the company says takes one minute—and fold back up for driving. A runway is still required to take off and land.

    The Transition is being marketed more as a plane that drives than a car that flies, although it is both. The company has been working with FAA to meet aircraft regulations, and with the National Highway Traffic Safety Administration to meet vehicle safety regulations.

    The company is aiming to sell the Transition to private pilots as a more convenient and cheaper way to fly. They say it saves you the trouble of trying to find another mode of transportation to get to and from airports: You drive the car to the airport and then you're good to go. When you land, you fold up the wings and hit the road. There are no expensive parking fees because you don't have to store it at an airport—you park it in the garage at home.

    The car­plane is designed to fly primarily under 10,000 feet. It has a maximum takeoff weight of 1,430 pounds, including fuel and passengers. Terrafugia says the Transition reduces the potential for an accident by allowing pilots to drive under bad weather instead of flying into marginal(临界)conditions.

    The Transition's price tag: $194,000. But there may be additional charges for options like a radio, transponder or GPS. Another option is a full­plane parachute.

    "If you get into a very awful situation, it is the necessary safety option," Gersh said. So far, the company has more than 70 orders with deposits. "We're working very closely with them, but there are still some remaining steps," Brown said.

    In the space of just two years, the app Douyin, created by Beijing-based company ByteDance, has gathered more than half a billion users—around 40%of them outside China—who share short videos of themselves lip-syncing (假唱), cooking, dancing or just being silly. What sets ByteDance apart is its success in the social media category, which is controlled by Facebook, Twitter and Snap—all Western companies.

    ByteDance calls itself an artificial intelligence company. It uses machine learning and algorithms (算法) to figure out what people like most and give them more of what they want to see. On Douyin, people can edit and beautify 15-second videos before posting them online. The app has even made a phrase to describe people glued to their customized feeds: "shua Douyin" or "scrolling through Douyin". Last year, the company released TikTok, the overseas version of Douyin. ByteDance's growing video empire has made it the world's fifth biggest app maker. ByteDance says TikTok and Douyin together have more than 500 million monthly active users.

    Investors like ByteDance because its hundreds of millions of users attract a lot of advertising money. The video apps are lucrative because they attract a lot of users in their teens and 20s, who are more generous with the money. ByteDance also makes money through income sharing deals. People on TikTok, for example, can buy digital coins to give to other people on the app—like throwing money in a performer's tip jar. ByteDance takes a cut of those earnings.

    ByteDance's founder and CEO is Zhang Yiming, a 35-year-old former Microsoft employee. People who have worked with Zhang describe him as someone who thinks deeply about technology and spends much of his free time writing code.

    Like Facebook and Twitter, ByteDance is also battling fake news and inappropriate content. ByteDance promises to add thousands more employees to review content on Douyin.

    We have many trips for you to explore the world your way. Our travel ideas are as diverse as the world itself and are designed to let you experience it. Please start with the following four trips.

Athens and Crete Explorer

London for Families

Australia & New Zealand

Classic Egypt