Have you ever had one of those days when all you wanted to do was read an emotionally powerful story that would cause you to tears? Most of us tend to be attracted by stories that reach us on multiple levels, including sadness. There are plenty of books that make you cry (and sometimes laugh) and that you can really sink your teeth into. Here are four of them.

    ⒈The Kite Runner

    This realistic and moving description of life in Afghanistan accounts for the people who were badly affected by the Taliban. You'll cry as you get to know the familial relationships and cruelty involved, but you'll also get a sense of hope as you quickly read through this appealing novel.

    ⒉The Book Thief

    Let's put it this way: Death itself is the narrator. The story is about a young girl named Liesel who has to live with foster parents during World War II. On the way to her new home, her brother dies, setting the gloomy tone for the story. There is hope, however, when Liesel discovers her love for reading and makes a relationship with a young Jewish man she helps hide from the Nazis.

    ⒊The Fault in Our Stars

    This is probably the most likely book on the list to make you cry, as it records the experiences of teens who are dying from cancer and living their last days in love. Their lifestyle is tragic and disturbing at the same time, as we watch their health worsen. The real tragedy is the love story between the main characters, who know that their romance is fruitless.

    ⒋A Child Called “It”

    Easily one of the saddest stories of abuse in recent decades, A Child Called It is based on the true story of Dave Pelzer, a boy from California who suffered at the hands of his cruel family. The tears will come from both sadness and the inspiration tied to Dave's fight for survival in an environment where he is believed worthless.

    Imagine jet-setting from Tokyo to Paris, enjoying first-class travel, a four-course dinner and a city tour－all without leaving the ground. This is the future of air travel according to Japanese company First Airlines, which has used the power of virtual reality to create dream vacations.

    Passengers avoid the costly airport transfer, the baggage fees or busy airport terminal（航站楼）－and instead enjoy the privileges of business or first-class travel and an expensive tour of Paris－all while remaining motionless in Tokyo. As well as Paris, First Airlines also offers the virtual destinations of New York, Rome and Hawaii.

    After boarding, guests can settle down for the two-hour flight on their advanced Airbus seat－surrounded by decoration that is modeled on the inside of an aircraft, for maximum realism. There is flight service and VR, foods, music for every destination. Passengers will be served a delicious meal by air stewards, alongside drinks and other desserts. The menu depends on the destination of choice－Manhattan clam chowder and cheesecake for New York and salmon tartar and onion soup for Paris. After landing at the destination, guests can enjoy a 360-degree tour of the destination－all thanks to projection（投影）mapping and video.

    It makes for a supposedly stress-free vacation, perfect for those whose ability to travel abroad is limited by cost or health. Virtual reality is becoming increasingly present everywhere at all times in the world of travel－allowing travelers to appreciate the wonders of the world, all without leaving their house.

    At just 4,980 yen（$ 46）for business class and 5,980 yen（$ 56）for first class－these two- hour flights are far more affordable than their real-life flights. Tokyo citizens eager to experience First Airlines can book a trip on the website, with reservations currently being taken until May 2018.

    The Frick Collection (5th Avenue and E. 70th Street)

    Many art lovers would rather visit this small art gallery than any other in New York. Henry Clay Frick, a rich New Yorker, died in 1919, leaving his house, furniture and art collections to American people. Frick had a preference for pre­twentieth century Western paintings, and these are well­represented in this excellent collection. You can also explore Frick's beautiful house and garden which are well worth a visit

    Guggenheim Museum (5th Avenue and 88th Street)

    This museum owns 5,000 excellent modern paintings, sculptures and drawings. These art works are not all displayed at the same time. The exhibition is always changing. It will appeal to those who love Impressionist and Post­Impressionist paintings. The Guggenheim Museum building is also world­famous. The best way to see the paintings is to start from the top floor and walk down to the bottom. There are no stairs, just a circular(环形的) path.

    Metropolitan Museum of Art (5th Avenue and 82nd Street)

    The reputation of this museum lies in the variety of its art collection. This covers more than 5,000 years of civilization from many parts of the world. The museum displays more than just the visual delights of art. It introduces you in ancient ways of living. You can visit an Egyptian temple, a fragrant Ming garden, a typical room in an 18th century French house and many other special exhibitions.

    Whitney Museum of American Art (945 Madsion Avenue, near 75th Street)

    The Whitney holds an excellent collection or contemporary American paintings and sculptures. There are no permanent displays in this museum and exhibitions change all the time. Every two years, the Whitney holds a special exhibition of new art by living artists. The museum also shows videos and films by contemporary video artists.

Richard Holmes, a British author and academic, is something of a Romantic, famous for biographies of Percy Bysshe Shelley and Samuel Taylor Coleridge. In his last book, "The Age of Wonder", he wrote about science and Romanticism and their common commitment to discovery. In his new book, "Falling Upwards", he combines the two again to tell the stories of Europe's early balloonists (气球飞行者).

Mr Holmes's love of balloons was aroused at a village festival and his enthusiasm is one of the book's many pleasures. He refers to the cheerful tone used in many first-hand ballooning stories, and applies it in this second-hand account. He describes men and women wrapped up in fur coats under their hydrogen-filled balloons, enjoying cold chicken and champagne and looking back to earth to see mankind "for what it really is."

Mr Holmes makes much of the strange side of ballooning, but the book is at its best when examining its more serious applications. In the American civil war, for example, both North and South put observers in balloons to spy on enemy movements. And during the Prussian attack on Paris in 1870-71， balloonists managed to fly out of the city to communicate with the French government in exile (流亡) in Tours.

"Falling Upwards" contains much of the historian's writing characteristics, such as footnotes and bibliography (文献书目), but its epilogue (后记) refers modestly to what has gone before as "a series of true balloon stories". It does touch on the more technical aspects of ballooning, and says little about the French Montgolfier brothers who are credited as its inventors. That though seems a small price to pay for such a spirited work. Mr Holmes's tale ends at the start of the 20th century when the business of flight was being handed over to the airship and the airplane.

When I first heard about the improv(即兴表演) classes, I was torn. As an introvert, I feared getting on stage and improvising in front of strangers. However, I knew I wanted to work as a science communicator after finishing my Ph.D. , so it seemed like the perfect opportunity to improve my speaking ability and gain confidence thinking on my feet.

During our first class, we learned a core concept of improv: "yes, and." It means that, as improvisers, we accept what fellow performers say. If someone says that rhinos(犀牛) are librarians, for example, then rhinos are librarians. We do not question the logic; we say "yes" and continue with the scene as if no him is wrong.

I got a taste of how difficult that was when acting out my first scene. My classmate turned to me and said, "Mom is going to be so mad." Mad about what? My mind spun out ideas, and my inner critic shot them all down. We broke the car? No, that's too easy. We failed a test? No, you don't want your classmates thinking you're stupid on the first day. I finally landed on an answer: "Yes, we're going to be late for dinner." The scene proceeded from there, and we eventually finished as two sisters who lost their way on a hiking trail.

The first few scenes were hard, but as weeks turned into months, I became more comfortable thinking on my feet and even started to enjoy our classes. I never silenced my inner critic entirely, but over time, I didn't police my words with quite so much effort. I also became better at listening, relating to my conversation partners, and communicating clearly in the moment.

That training proved useful 6 months ago, when my experiments generated unreasonable data. Early on in graduate school, I would get stuck when this happened; my inner critic would assume I had made a mistake. But then, after embracing the "yes, and" concept, instead of getting discouraged, I kept exploring the data and ended up identifying a new type of cell—one that wasn't behaving as expected. If I hadn't accepted the possibility that the results were real, I would have missed out on the most exciting finding of my Ph.D. so far.

All scientists can benefit from this lesson. If the data say rhinos are librarians, then it's worth investigating whether rhinos are, in fact, librarians. Our job as scientists isn't to generate data that support a preconceived(预想的) story. Our job is to say "yes, and."