I am 26. I'm clear that I'm never going to catch up with Mother Teresa. But I want to do something to help people every single day like her.

    Everybody thinks we just serve food and soda. The safety training is serious and stressful. Caring for 49 people in a business class in 90 minutes is not easy. I had a roommate who was a waitress; she just left a candle and a table cloth burning, and I used a fire extinguisher to put out the fire. If something goes bad at her job, she calls the police. But if something happens up in the air, it's up to us.

    I'm single and have no kids. I've flown every Christmas since 1995. If I fly, someone else can be with their kids. Christmas in an airport can be depressing, but it's the little things that make a difference.

We're not robots. It's hard to put on a smile and just pretend everything is great when it isn't. I've seen co-workers lose a family member the day before a trip and just pull themselves together (take control of their feelings and behave in a calm way). At the end of a 14-hour flight, it's like, "It was really nice to help you, but I'm ready for you to get off the plane." Those last 15 minutes can be the longest 15 minutes of your life. You can't wait to turn off the flight attendant's voice and get something to eat without anyone saying "Excuse me."

Sometimes I go all day and never hear a "please" or a "thank you" when you say "thank you", it's huge. It makes us feel like you actually see us as fellow humans. We're up there together at a height of 30,000 feet, enjoying the miracle of the modern flight.

    With all the traditional media channels, including newspapers, magazines and television shows, shrinking, advertisers are worrying about how they can reach customers. Banners(横幅) ads on our devices are ugly and disturbing. To overcome various digital problems, the ad industry has been serving up a sneaky(不光明正大的) solution: make ads look less like ads and more like the articles, videos and posts around them.

    This trend, called native advertising, has taken over the Internet; even the websites such as NYTimes.com and Wall-Street.com are using it. On Facebook and Twitter, every 10th item or so is an ad; only the small subtitle “Sponsored（赞助）” appearing in light gray type tells you which posts are ads.

    Won't dressing up ads to make them look like reported articles mislead people? Sometimes, yes. An Interactive Advertising Bureau study found that only 41 percent of general news readers could tell such ads apart from real news stories. And it's getting worse. Advertisers worry that the “Sponsored” label discourages readers from clicking, so some websites are making the labels smaller and less noticeable. Sometimes the labels disappear entirely.

    At a recent talk about the difficulty of advertising in the new, small-screen world, I heard an ad manager tell an impressive story. She had gotten a musical performance – paid for by her soft drink client- perfectly inserted（插入）into a TV awards show, without any moment of blackness before or after. “It looked just like part of the real broadcast!” she recounted happily.

    Look, it is great that native advertising works. But if advertisers truly believe in their material, they should have no problem labeling it as advertising.

    For now native ads continue to be a fashion- with no laws governing them and no labeling standard. But that could change; the Federal Trade Commission has begun considering regulation. If the new generation of digital advertisers clean up their act according to the regulation, native ads might become more acceptable.

    Studying the DNA of 300 mice has flagged up genes which have been linked to hereditary (遗传的) sight loss for the first time. Researchers say because mice's genes are so similar to humans', their findings could lead to the treatment of more genetic diseases.

    Scientists at the University of California, Davis studied information from a data bank of mice's genetic material. They found 347 genes linked to eye problems, with just 86 of them having been studied in the past.

    Only around 50 to 75 percent of hereditary eye diseases in human can be explained with present science. The researchers believe these hundreds of new genes found in mice could be a key to explaining-and therefore being able to treat the other 25-50 percent.

    "This is extremely valuable for people with hereditary eye disease," said researcher Professor Ala Moshiri. "All researchers are going to start using these data. In the past, we knew the problem was there but we didn't know where to look. Now eye centers can call back patients and screen them for these new genes. We expected that more and more of these genetic diseases will be treatable." Also, the fact is that more than 60 percent of eye problems at birth are ones resulting from the baby's parents!

    Thanks to data from the International Mouse Phenotyping Consortium (IMPC), which is trying to work out what every single gene in a mouse is responsible for, with the aim of translating it to humans, scientists are moving closer to figuring out all genetic causes of blindness. To do this, scientists separate a single gene from other ones at a time and then observe what effect it has on the mouse for a long time. This has so far been done more than 7,000 times and has achieved great success. Researchers are now working alongside eye care centers in Texas and Iowa in order to compare the mice's genes to those of patients.

    Madame Marie Curie famously won two Nobel Prizes, but many other women have also been awarded the prize, too. Here are their stories.

    Selma Lagerlof

    Selma Lagerlof was a Swedish author and teacher. She published her first novel, Gosta Berling's Saga, at the age of 33. She was the first female writer to win the Nobel Prize in Literature which she was awarded in 1909. Additionally, she was the first female to be granted membership in the Swedish Academy.

    Gerty Theresa Cori

    Gerty and her husband, Carl Cori, met in Prague and lived in Austria before immigrating to the United States in 1922, where the two medical doctors worked together at Roswell Park Comprehensive Cancer Center in New York. In 1947, Gerty and Carl were awarded the Nobel Prize in Physiology or Medicine, making Gerty Cori the first woman to hold the honor.

    Maria Goeppert-Mayer

    In 1942, Maria Goeppert-Mayer joined the Manhattan Project. From there, she moved on to Los Alamos National Laboratory, then to Argonne National Laboratory, where Goeppert-Mayer developed the nuclear shell model. For this, she shared the 1963 Nobel Prize in Physics with J. Hans D. Jensen and Eugene Paul Wigner.

    Dorothy Crowfoot Hodgkin

    Dorothy Hodgkin's mother encouraged her love of science as a child, and at age 18, she began studying chemistry at a women-only Oxford college. Her work on mapping vitamin B12 earned her the Nobel Prize in Chemistry in 1964.

    I was driving my newly acquired motorcycle across the vastness of North Dakota when all of the sudden it froze up on the road. I would later be told the belt had slipped and this caused one of the pistons(活塞)to break a cylinder(气缸)head, or something like that.

    Anyway, I sat on the side of the road for what seemed like hours. I even pretended to have been in an accident, which didn't help. Finally, a young man pulled over and offered me a ride, but given that he already had two motorcycles in the back of his truck, he could only take me.

    He drove me to the next town, where I asked to be dropped off Rather than drop me off, he waited while I asked around if anyone could help me to pick up my motorcycle. One elderly gentleman was working and said that I could use his pickup! Can you imagine that a stranger gave me the keys to his pick up. It was quite an experience, I must say. So, as I drove back 20 miles to get my motorcycle, the gentleman who first stopped to help me followed me. We both put the motorcycle in the back of the truck and then I followed him another 50 miles or so and we both unloaded the motorcycle at his place. Then, he followed me back to the small town so I could return the man's truck. I didn't have much cash on me, maybe $40, but I gave it to the man for the use of his truck.

    Two strangers helped rescue me from spending the night on the side of the road in ND. I don't recall their names, but when I close my eyes I can see their faces as if it were yesterday. Thank you, strangers. You may be reading this right now.

    In our annual Readers' Choice Awards survey, we asked our readers to rate their favorite cities in the world for arts and culture. These cities are centers of music and dance, museums, and theaters. Here are four of them where you can find inspiration in the arts, starting with the top spot.

    Rome, Italy

    At its peak, the Roman Empire extended over nearly two million square miles of land across Europe, Asia Minor and North Africa. Today, that history is on display everywhere. The city's main attractions are famous not because of tourist advertisements, but because they are really so impressive. No wonder it's known as the Eternal City: You could spend forever here and find new artistic and cultural treasures every day.

    Paris, France

    Hemingway famously called Paris "a moveable feast", but wherever you go while in the city, there is always something to see, hear, taste or feel. With some 150 museums, Paris doubles as an art history class, offering the very best of the discipline across centuries and styles.

    London, United Kingdom

    London is inspiration and setting for the rise of Shakespeare, Dickens, Orwell and Eliot and the breeding ground for all those iconic (标志性的) bands: The Kinks, The Clash and The Stones. London is also Banksy's favorite canvas, home to more than 1,000 galleries, and the kind of place where you can spend a whole day in a single museum and still be ready for more when it opens the next morning.

    Vienna, Austria

    As we all know, Western music would be unrecognizable without Austria's capital, which nurtured many famous musicians. It's also the site of the Vienna Secession, a revolutionary art movement founded in 1897 by Gustav Klimt. Visitors today can see the fruits of all that creativity in the city's 100 – odd museums.