William Purkey, a well-known professor of education, said, “Dance like no one is watching, love you'll never be hurt, sing like no one is listening, and live like it's heaven on earh.” It seems like the perfect life philosophy — and one I've learned to apply to running over the year.

    But I didn't always feel this way. In my early days, when I weighed 240 pounds, I ran like everyone was watching — and judging. If I was on a run and saw a car approaching, I'd stop and pretend I was looking for something I'd lost. I bought the high-tech gear and clothes that I thought would make people believe I was a runner. And I didn't have a clue if the expensive shoes I was wearing were the right kind for me — I just wanted to look like I fit in with this group.

    To be honest, I felt a certain satisfaction in believing that someone was watching. I really thought that other people cared about my performance. The best example of this was a combined, two-lap marathon in Florence, Italy. As I approached the finishing line, the crowd began to cheer. I was surprised. Here I was, thousands of miles from home, and the Italians were shouting for “IIPenguino.”

    About 20 yards from the finishing, the truth set in when the winner of the full marathon went past me as I was finishing the half-marathon. No one was cheering for me. No one probably even noticed that I was finishing. I couldn't help but smile at my own illusion of self-importance.

    That's when I realized I had been running for every reason except the right one. I ran to make other people happy, ran to live up to their expectations. But no one was watching — no one cared. So I decided I was going to run for me—just me—and gained a new enjoyment from the sport I hadn't truly experienced yet. I've learned to run like no one is watching.

    So if you see me at race, and I look like a 60-year-old guy waddling(蹒跚) along, don't worry. I'm fine. The miracle isn't that I finished. The miracle is that I had the courage to start.

    For those concerned about wrinkly old skin, it might be a creative solution: an elastic(有弹性的) “second skin” that can be smoothed on to make aged tissue look more youthful.

    The wearable film, developed at the Massachusetts Institute of Technology (MIT), has shown promise in a series of small experiments where it was applied to wrinkles, under-eye bags and areas of dry skin. When applied to the face or body, the thin, transparent layer sticks to the skin and supports the tissue, making it look and behave like younger skin, its producers claim.

    “What we've been able to do is create a cream that you can put on the skin, and then when it's on the skin it can actually form, essentially, an elastic second skin,” said Bob Langer, who led the research. Tests in the lab found that the polymer film (高分子膜), which is only 70 thousandths of a millimeter thick, reduced the appearance of wrinkles and under-eye bags, and helped keep moisture (水分) in areas of dry skin.

    The layer is designed to be applied in the morning, then peeled off at night, In previous studies, the second skin withstood normal daily wear, and the stresses and strains of exercise and swimming, without falling off or causing irritation. It also survived exposure to rain.

    “It's something you can wear for a whole day or longer, depending on the physical forces that get applied to the area where it is worn, "said Daniel Anderson, who helped develop the product at MIT. “You can't tell you're wearing it.”

    While normal cosmetics can mask imperfections on the skin, the new coating changes the way skin behaves by giving it the elasticity of young skin. It was developed with help from two companies.

    Does the amount of cash in a lost wallet influence how likely a person is to return it? Classical economic theories suggest that the greater the appeal, the less likely we are to be honest—but a new study turns the idea on its head, finding altruism(利他主义), and a powerful hate for viewing oneself as a "thief" outweigh the financial attraction.

    A team of researchers conducted a huge experiment concerning 355 cities in 40 countries. More than 17,000 identical wallets were dropped off at public places, each containing a grocery list, a key, and three business cards in the local language using made-up names and an email address. Some had no money while others contained the equivalent (等值) of $13.45.

    According to the research, people on average returned 40% of wallets with no money in them but 51%with money. It also shows extreme differences between countries. But although rates of people's honesty varied greatly from country to country, one thing remained remarkably constant: wallets with money, as opposed to no money, raised reporting rates.

    In the US, the UK and Poland, they repeated the experiment with even more money: $94.15, which increased reporting rates by an average of 11% compared to the smaller amount. They also found that having a key expanded reporting rates by 9.2%.

    The findings, which run counter to a fundamental principle of classical economics, suggest honesty, altruism and self-image can sometimes be more influential than economic self-interest.

    A purely economic approach to behavior suggests people would keep the wallets with the larger amounts of money due to the increased financial reward, but economics often doesn't account for a person's sense of honesty or self-image, according to behavioral scientists. Altruism also influenced the findings, the researchers say. Since the key is valuable to the owner but not the finder, this pointed toward an altruism concern in addition to the cost of negatively updating one's self image.

    What is your favorite color? Do you like yellow, orange, red? If you do, you must be an optimist, a leader, an active person who enjoys life, people and excitement. Do you prefer graysand blues? Then you are probably quiet, shy and you would rather follow than lead. If you love green, you are strong-minded and determined. You wish to succeed and want other people to see you are successful. At least this is what psychologists tell us, and they should know, because they have been seriously studying the meaning of color preference, and the effect that colors have on human beings. They tell us that we don't choose our favorite color as we grow up. If you happen to love brown, you did so as soon as you opened your eyes, or at least as soon as you could see clearly.

    A yellow room makes us feel more cheerful and comfortable than a dark green one, and a red dress rings warmth and cheer to the saddest winter day. On the other hand, black is depressing. Light and bright colors make people not only happier but also more active. It is a fact that factory workers work better, harder, and have fewer accidents when their machines are painted orange rather than black or dark grey.

    Remember, then, that if you feel low, you can always brighten your day or your life with a new shirt or a few colorful things. Remember also that you will know your friends and your enemies better when you find out what colors they like and dislike. And don't forget that anyone can guess a lot about your character when you choose a piece of handkerchief.

    It was the final climb on his search to reach the highest top on all seven continents. When Christopher Kulish finally reached Mount Everest's 29,035-foot peak, he joined an elite group known as the "Seven Summits Club"(七峰俱乐部). But the 62-year-old Colorado attorney died suddenly Monday after returning to the first camp below the mountain's summit. He's the second American to die in the past week after reaching Everest's highest point. His family believes the cause was a heart attack, according to theDenver Post. "He saw his last sunrise from the highest peak on Earth," his brother, Mark Kulish, said in a statement to the Denver Post. "We are heartbroken at this news."

    Last week, 55-year-old Donald Lynn Cash of Utah collapsed and died just after reaching the Everest peak. He too had reached the highest point on all seven continents. Including Christopher and Cash, at least 11 people have died on Mount Everest this year.

    The deaths come among reports of overcrowding on the popular mountain. The Nepali government granted a total of 381 permits to climb Everest this year, a number that doesn't include guides who are on the mountain as well. For some climbers, that traffic has meant longer wait times — some told the Himalayan Times the wait has been over two hours between the last camp and the peak. Mountaineer Vanessa O'Brien, who has also climbed the seven summits, said when there's a crowd, being a more experienced climber won't help you. "It doesn't matter if you're the best racecar driver in the world. If you're stuck in traffic, you're stuck in traffic," she said in an interview.

    And when a climber is stuck in that traffic, "their body is starting to deteriorate(恶化)." O'Brien, who set a record as the fastest woman to reach the highest peak on every continent, also said the descent(下降) is often harder than the climb.

    Climbing expert Alan Arnette said there's no simple explanation for the string of deaths. He said weather that has led to a shorter climbing season is one factor causing overcrowding. He also said the cost to climb Mount Everest has decreased, which means more people are making the journey. He urged the governments in charge of granting(同意)permits to limit how many people can be on the mountain at once.

    Still, Christopher was no beginner. His family said he'd been mountain climbing for five decades. He arrived at the base camp nearly two months before his climb so he could give himself time to adapt to the conditions. When he made his journey, his family said he was climbing with a small group in almost ideal conditions after some of the overcrowding had cleared.

    His brother described being a lawyer as a "day job" for Christopher. Climbing was his love. "He was an inveterate climber of peaks in Colorado, the West and the world over," Mark Kulish said. "He passed away doing what he loved."