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Another aha! moment came from a 2010 Wayne State University research project that looked into pre-1950s baseball cards of Major League players.
另一項令人頓悟的研究是由2010年韋恩州立大學進行的，這個項目研究了二十世紀五十年代前美國職業棒球聯盟球員卡。
The researchers found that the span of a player's smile could actually predict the span of his life.
這些研究者發現一個球員笑臉的綻放程度能夠預測其壽命的長短。
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.
沒有在照片上露出微笑的球員平均壽命只有72.9歲，而那些微笑的球員平均壽命將近80歲。
The good news is that we're actually born smiling.
好消息是我們天生就會微笑。
Using 3D ultrasound technology, we can now see that developing babies appear to smile, even in the womb.
通過三維超聲波技術我們可以看到，即使在子宮中，正在成形的胎兒似乎也是面帶微笑的。
When they're born, babies continue to smile -- initially, mostly in their sleep.
出生之后，他們還是帶著微笑－－他們大多在睡夢中微笑。
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.
失明的嬰兒聽到人聲時也會微笑。微笑是全人類生理上最統一、最基本的表情。
In studies conducted in Papua New Guinea, Paul Ekman, the world's most renowned researcher on facial expressions,
在巴布亞新幾內亞進行的一些研究中，世界上最知名的面部表情研究者保羅·艾克曼，
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.
發現原始部落Fore的成員，雖然與西方文化相隔絕并以其食人肉的宗教習性著稱，但他們也像我們一樣在不同場合下會露出微笑。
So from Papua New Guinea to Hollywood all the way to modern art in Beijing, we smile often, and use smiles to express joy and satisfaction.
從巴布亞新幾內亞到好萊塢，再到北京的現代藝術我們經常微笑，以微笑來表達喜悅美滿之情。
