When I was a child, I always wanted to be a superhero. I wanted to save the world and then make everyone happy. But I knew that I'd need superpowers to make my dreams come true. So I used to embark on these imaginary journeys to find intergalactic objects from planet Krypton, which was a lot of fun, but didn't get much result. When I grew up, and realized that science-fiction was not a good source for superpowers, I decided instead to embark on a journey of real science, to find a more useful truth.
我童年時，一直想成爲一位超級英雄，我想拯救世界，讓每個人都快樂，但我知道需要超能力才能讓我的夢想成真，所以我展開這些想象之旅，到克利普頓星(超人的家鄉)尋找星際間的天體。這很有趣，但沒什麼成果。當我長大後，瞭解到科幻小說不是超能力的好來源，我決定展開一場真正的科學之旅，尋找更有用的真理。
I started my journey in California with a UC Berkley 30-year longitudinal study that examined the photos of students in an old yearbook and tried to measure their success and well-being throughout their life. By measuring their student smiles, researchers were able to predict how fulfilling and long-lasting a subject's marriage will be, how well she would score on standardized tests of well-being and how inspiring she would be to others. In another yearbook, I stumbled upon Barry Obama's picture. When I first saw his picture, I thought that these superpowers came from his super collar. But now I know it was all in his smile.
我的旅程開始於加州，以柏克萊大學從事30年期的縱貫研究，研究一本舊年鑑中的學生照片，試着衡量他們一生的成就和幸福。藉由衡量學生的微笑，研究人員能夠預測研究對象的婚姻是否圓滿及長久，他在標準化幸福評量中能得到多少分，以及他能爲別人帶來多少啓發。在另一本年鑑中，我偶然發現了歐巴馬的照片，當我第一次看到他的照片時，我認爲這些超能力來自於他的超大衣領，但現在我知道這全來自於他的笑容。
Another aha! moment came from a 2010 Wayne State University research project that looked into pre-1950s baseball cards of Major League players. The researchers found that the span of a players smile could actually predict the span of his life. Players who didn't smile in their pictures lived an average of only 72.9 years, where players with beaming smiles lived an average of almost 80 years.
另一個啊哈!時刻，來自2010年Wayne州立大學的研究項目，觀察50年代前職棒大聯盟球員的棒球卡，研究人員發現，球員微笑的寬度事實上可以預測他壽命的長度，相片中沒有笑容的球員，平均壽命僅72.9歲，擁有燦爛笑容的球員，平均壽命將近80歲。
(Laughter)(笑聲)
The good news is that we're actually born smiling. Using 3D ultrasound technology, we can now see that developing babies appear to smile, even in the womb. When they're born, babies continue to smile -- initially, mostly in their sleep. And even blind babies smile to the sound of the human voice. Smiling is one of the most basic, biologically-uniform expressions of all humans.
In studies conducted in Papua New Guinea, Paul Ekman, the world's most renowned researcher on facial expressions, found that even members of the Fore tribe, who were completely disconnected from Western culture, and also known for their unusual cannibalism rituals, attributed smiles to descriptions of situations the same way you and I would. So from Papau New Guinea to Hollywood all the way to modern art in Beijing, we smile often, and you smile to express joy and satisfaction.
在巴布亞新幾內亞進行的研究中，Paul Ekman，世界上最知名的臉部表情研究者發現，即使是Fore部落中的成員，他們完全與西方文化隔絕，也因他們不尋常的吃人儀式而衆所皆知，他們就像你我一樣，也會在某些情況下微笑。因此，從巴布亞新幾內亞到好萊塢，一直到北京的現代藝術，我們經常微笑着。你用微笑來表達喜悅和滿足。
How many people here in this room smile more than 20 times per day? Raise your hand if you do. Oh, wow. Outside of this room, more than a third of us smile more than 20 times per day, whereas less than 14 percent of us smile less than five. In fact, those with the most amazing superpowers are actually children who smile as many as 400 times per day.
在這房間裏，有多少人每天微笑超過20次?如果有的`話請舉起手。哦，哇!在這個房間外，超過三分之一的人每天微笑超過20次，不到14%的人每天微笑少於5次。事實上，擁有最驚人超能力的是孩童，他們每天微笑多達400次。
Have you ever wondered why being around children who smile so frequently makes you smile very often? A recent study at Uppsala University in Sweden found that it's very difficult to frown when looking at someone who smiles. You ask, why? Because smiling is evolutionarily contagious, and it suppresses the control we usually have on our facial muscles. Mimicking a smile and experiencing it physically help us understand whether our smile is fake or real, so we can understand the emotional state of the smiler.
你有沒有想過，爲什麼身處在經常微笑的孩子身邊，也會讓你經常微笑?最近在瑞典Uppsala大學的一項研究發現，當看着正在微笑的人時是很難皺眉的。你會問爲什麼?因爲微笑具有演化上的感染性，它能抑制我們平時對臉部肌肉的控制，模仿一個微笑並實際體驗它，幫助我們瞭解我們的微笑是假是真，因此我們可以瞭解微笑者的情緒狀態。