WEBVTT

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Everything we know about physics could still be all turned on its head. 
我們所知物理的一切很可能大翻盤。

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Back in September, scientists said that they discovered subatomic particles that can travel faster than light.
先前九月時，科學家表示他們發現亞原子粒子能行進得比光還要快。

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Now, they've gone back to the lab, fine-tuned the experiment, and the result? 
如今，他們已經重回實驗室，精細調整了實驗，而結果呢？

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Well, it seems to confirm the startling finding, as Atika Shubert explains.
似乎證實了這項驚人的發現，請看阿緹卡‧舒伯特說明。

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Do they or don't they?
他們會還是不會？

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Those pesky neutrinos are back and stubbornly refusing to obey the laws of physics and slow down.
那些麻煩的微中子又回來了，而且堅決不肯遵守物理定律，也不肯放慢腳步。

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Remember this? In September, scientists announced some shocking results. 
記得這件事嗎？九月時，科學家發表了一些驚人的結果。

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They shot a particle beam from Switzerland to Italy in 2.4 milliseconds. That's what it should take for a beam of light to cover that distance.
他們從瑞士發射一道粒子光速到義大利，歷時二點四毫秒，這正是光速跑完這段距離所應耗費的時間。

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But neutrinos, those tiny subatomic particles with virtually no mass and no electrical charge, 
但是微中子，就是那些實際上沒有質量且不帶電的細小亞原子粒子，

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well, they managed to arrive 60 billionths of a second faster than light.
它們就是有辦法比光速快六百億分之一秒抵達終點。

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Pandemonium in the world of physics, and here's why. 
這真是物理界的災難，我來告訴你為什麼。

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Energy equals mass times the speed of light squared. It's the bedrock of physics, Einstein's theory of relativity. 
能量等於質量乘上光速的平方，這是物理學的基石，也就是愛因斯坦的相對論。

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The fundamental principle: nothing can go faster than the speed of light.
基本的原則是：沒有任何東西跑得比光快。

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Without that universal speed limit, 
要是沒有這放諸四海皆準的速限，

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physics as we know it would unravel, allowing for such mind-bending stuff as time travel.
我們所知的物理學可能會因此分崩離析，像時空旅行這種令人費解的事情就可能成立。

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Of course, the problem with time travel is something called the Grandfather Paradox, 
當然，時空旅行的一個問題是所謂的「祖父悖論」，

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which means, if I've traveled back in time, and then I accidentally kill my grandfather, 
也就是說，如果我旅行到過去，然後意外殺了我的祖父，

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which means, Atika, you would never have been conceived and, therefore, could not travel back in time to see yourself.
這表示阿緹卡就永遠不會被生出來，因此也就不可能旅行回到過去看見自己。

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So, you can see why scientists went back to measure and remeasure, tweak and retweak the tests. 
所以，你能理解為什麼科學家要針對這些測試再三測量、反覆調整。

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And on Friday, they announced this: those speedy neutrinos are still faster than light.
週五他們宣布，那些高速的微中子仍然跑得比光快。

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So, is Back to the Future suddenly a real possibility? 
那麼，電影《回到未來》頓時可能成真了嗎？

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Scientists say two other labs in Japan and the U.S. are now conducting separate tests. But we won't get the results until next year.
科學家表示，另外兩個分別在日本和美國的實驗室目前正在分頭進行測試，但我們要到明年才能知道結果。