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  • Over 1.5 billion people use the internet every day, and they search for pretty much anything.

    每天有超過 15 億人使用網路,他們幾乎搜尋了所有的事情

  • Like "Why are barns red?" andWhat's up with gluten?”We here at SciShow are all about fostering curiosity.

    像「穀倉為什麼是紅色的?」、「為什麼麩質吃多了不好?」SciShow 的宗旨正是激發你的好奇心

  • That's why we've worked with Google and YouTube to answer ten of the most popular questions searched on the internet.

    所以我們與 Google 及 YouTube 合作,替你解答十大網路熱搜

  • This is The World's Most Asked Questions.

    新單元「全世界都在問的問題」

  • Today's question: What is love?

    今日主題:愛是什麼?

  • It's the kind of thing that keeps poets and philosophers up at night,

    這問題讓詩人和哲學家想破了頭

  • but science actually has a pretty good explanation for it, too.

    但其實很容易用科學解釋

  • Actually, several explanations.

    事實上,解釋還真多

  • And the answer might change depending on what kind of scientist you ask.

    答案可能因不同領域的科學家而異

  • A biologist would say it's all about reproduction, and the evolution and survival of a species.

    生物學家說愛是傳宗接代,關乎物種的進化與生存

  • A psychologist may go on about our need for togetherness and acceptance.

    心理學家可能會說,愛是渴求陪伴與接納

  • But possibly the best way to understand love is through chemistry. Brain chemistry.

    不過,說愛是大腦的化學反應,也許最爲合理,大腦化學

  • Although the heart is our symbol of love for some reason,

    雖然心形一直被視為愛的記號

  • when it comes down to it, love is all about the brain.

    但追根究底大腦才是關鍵

  • We know this because we can actually see love in action in brain scans.

    透過掃描,我們確實看見「愛」在大腦中運作

  • And you know what? It looks awful like a brain on cocaine.

    你知道嗎?愛的大腦反應超像喀藥

  • As a person first falls in love, at least a dozen different brain parts light up to release powerful chemicals --hormones and neurotransmitters

    一旦陷入愛河,大腦多處受刺激而釋放強大的化學物,荷爾蒙與神經介質

  • that trigger feelings of excitement, euphoria, bonding, and butterflies.

    引發興奮、愉悅、親密感,還讓你小鹿亂撞

  • Research also shows that the kind of unconditional love between a mother and child activates slightly different regions of the brain.

    研究也顯示,母親對孩子無條件的愛啟動的腦部中不同的區域

  • Early romantic love and attraction, what you might call passion, is all about flooding the brain's reward systems

    戀愛初期的激情,以海嘯之姿沖刷大腦的「獎酬系統」

  • in a tsunami of feel-good chemicals like adrenaline, norepinephrine, and dopamine.

    產生感覺良好物質,如腎上腺素、正腎上腺素和多巴胺

  • This is why a brain on intense new love looks a whole lot like a brain on coke

    所以墜入情網時,大腦就像喀了古柯鹼一樣

  • adrenaline and norepinephrine amp up your heart rate and get you all restless,

    腎上腺素和正腎上腺素提高心跳速率,使你心神不寧

  • while those dopamine drips leave you feeling euphoric.

    而多巴胺讓你快樂似神仙

  • These chemicals light up your brain's pleasure centers, lowering your pleasure thresholds,

    這些物質刺激「愉悅中樞」,降低你的快樂門檻

  • and making it easier to feel good about...everything.

    所以你能輕易對任何事感到開心

  • Interestingly, this kind of passionate new love is also marked by lowered serotonin levels,

    有趣的是,為愛痴狂的特徵是血清素濃度降低

  • similar to those found in people with obsessive-compulsive disorders

    與強迫症患者相似,

  • which may help explain those 30 texts your infatuated new lover sent while you were in the shower.

    這也許可以解釋為何只是洗個澡,情人卻瘋傳 30 封簡訊給你

  • Eventually, most of these more intense, obsessive components of new love settle down

    這種令人窒息的愛終將逐漸緩和,

  • into a deeper, calmer form of love associated with attachment and bonding.

    取而代之的是深切平靜的愛,親密地相互依賴

  • Here your brain chemistry starts changing again, and hormones like oxytocin and vasopressin take over.

    這時大腦再次起變化,由催產素和升壓素接管

  • Their mission, like Al Green's, is to get you to stay together.

    它們的使命是讓你們緊緊相依,就像那首艾爾格林的歌

  • You may have heard of oxytocin, the so-called the "cuddle hormone."

    你也許聽過催產素,所謂的「擁抱荷爾蒙」

  • It gets released during orgasms, and for women during childbirth, and it helps cement bonds between people.

    它在高潮或分娩時釋放,有助鞏固兩人情感

  • And you can think of vasopressin as the monogamy hormone.

    而升壓素有點像「忠誠荷爾蒙」

  • And you know who's taught us more about how it works than anything else?

    誰把「忠誠荷爾蒙」發揮得最淋漓盡致呢?

  • Prairie voles, one of the very few mammals that mate for life.

    草園田鼠,牠們是少數一夫一妻的哺乳類動物

  • After mating, a male vole's brain gets flooded with vasopressin, and essentially gets hooked on his mate forever.

    公田鼠在交配後腦部充滿升壓素,從此對母田鼠死心踏地

  • The two then have lots of sex, and all that tiny boot-knocking keeps the vasopressin flowing.

    兩隻小傢伙瘋狂的嘿咻,愛的撞擊使升壓素源源不絕

  • When researchers gave voles a compound that suppressed the effects of vasopressin,

    當研究人員對其施打抗升壓素的藥物後

  • the pairs quicklyfell apart, losing their devotion to each other.

    這對愛侶便很快分開,不再對彼此忠貞

  • So, while in the poetic sense, love may always be something of a mystery,

    以詩的角度來看,愛情可能永遠是個難解的謎

  • from the scientific view, it is within the realm of comprehension.

    但從科學的角度來看,它其實是個可以理解的領域

  • But what about you? How are the love lives of the SciShow viewers?

    你呢?SciShow 觀眾們的感情世界又是如何?

  • Well, of our survey takers, people within the ages of 51 and 60 are the most likely to have been in love.

    據我們調查,51-60 歲的人最有可能墜入情網

  • People who got their energy most from exercise were also more likely to have been in love.

    因運動而活力充沛的人也比較容易戀愛

  • On the other hand, people who said they got their energy from food were less likely to have been in love.

    另一方面,說自己靠吃東西補充能量的人則感情空洞

  • Of all the fascinating questions in the world, what question do you want answered most?

    世界上千奇百怪的問題這麼多,你最想知道什麼?

  • Let us know on Facebook or Twitter or in the comments down below, and we will answer the best questions in a new video at the end of the month.

    請上 Facebook 或 Twitter 告訴我們,或在下方留言,月底將選出最酷的問題來回答

  • And don't forget to use the hashtag #WMAQ and stay tuned for other videos this week.

    別忘加上關鍵字 #WMAQ,並持續鎖定本週最新影片

Over 1.5 billion people use the internet every day, and they search for pretty much anything.

每天有超過 15 億人使用網路,他們幾乎搜尋了所有的事情

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大哉問:愛到底是什麼? (World's Most Asked Questions: What Is Love?)

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    Halu Hsieh 發佈於 2015 年 02 月 13 日
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