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  • You're probably like billions of other people on the planet earth, happily going about your

    你可能像地球上其他數十億人一樣,快樂地過著你的生活。

  • daily life without a care in the world for any of the fundamental forces that make life

    草菅人命

  • on earth possible.

    地球上可能。

  • Yet even as you watch this video, one of those forces is experiencing an unexplained anomaly

    然而就在你看這段視頻的時候,其中一股力量正經歷著無法解釋的異常情況。

  • and unexpectedly weakening, potentially leaving the earth vulnerable to the almost complete

    並出乎意料地減弱,有可能使地球容易受到幾乎完全的。

  • extinction of life.

    生命的滅絕。

  • If what scientists are watching develop in real time persists, humanity has at best years

    如果科學家們實時觀察到的發展情況持續下去,人類最多還有幾年時間。

  • left to live, and the only thing to survive us will be microbial life in the deepest caves

    剩下的生活,唯一能讓我們活下來的就是最深的洞穴裡的微生物生命了

  • or darkest depths.

    或最黑暗的深處。

  • In 1958 it was well understood that the sun sent a steady stream of very dangerous high

    在1958年,人們清楚地知道,太陽發出了源源不斷的非常危險的高空飛行。

  • energy particles and radiation crashing towards the earth.

    能量粒子和輻射向地球撞擊。

  • What kept life safe from this peril was the earth's powerful magnetic field, stretching

    是什麼讓生命免於這種危險呢? 是地球強大的磁場,綿延不絕

  • out thousands of miles into space and shielding us from the worst of the solar wind.

    在數千英里外的太空中 保護我們免受最惡劣的太陽風的影響

  • So try and imagine their horror when scientists in 1958 discovered that this invisible shield

    所以,試想一下,當1958年科學家們發現這個無形的盾牌時,他們的驚恐是什麼?

  • we rely on for life to continue on earth, was actually weakening.

    我們賴以在地球上延續生命的東西,其實正在減弱。

  • Known as the South Atlantic Anomaly, it is an area of weakening magnetic field that grows

    它被稱為南大西洋異常,是一個磁場減弱的區域,它增長了

  • on average by 12.4 miles per year (20 km).

    平均每年增加12.4英里(20公里)。

  • The area has been closely monitored since its discovery, and today this chink in the

    該地區自被發現以來一直受到嚴密監視,如今這個缺口在

  • earth's protective armor comes down to just over 100 miles over the surface of our planet.

    地球的保護裝甲降到了地球表面100多英里的地方。

  • The anomaly has already taken a devastating toll on manned and unmanned spacecraft, and

    這一異常現象已經對載人和無人航天器造成了破壞性的損失,而且。

  • modern satellites can't operate in the area without special precautions- or risk destruction.

    如果沒有特殊的預防措施,現代衛星不能在該地區運行,否則就有被摧毀的危險。

  • But what is this anomaly exactly, and why is it so dangerous?

    但這種異常情況到底是什麼,為什麼會如此危險?

  • Texans might not like it, but the truth is all life on earth is solar powered- yes, even

    德州人可能不喜歡,但事實是地球上所有的生命都是由太陽能驅動的--是的,甚至是。

  • you.

    你。

  • The food you eat either ate food that got its energy from the sun, or was food that

    你吃的食物要麼是吃了從太陽中獲得能量的食物,要麼是吃了從太陽中獲得能量的食物

  • got its energy from the sun.

    從太陽中獲取能量。

  • For the kids in the cheap seats, we're talking about plants here.

    對於坐在廉價座位上的孩子們,我們在這裡談論的是植物。

  • The sun is basically the giver of all life, but it can also be the taker of that same

    太陽基本上是所有生命的賜予者,但它也可以是那同樣的施予者

  • life.

    生命。

  • That's because all that nice warm sunshine you enjoy on a sunny summer day is only a

    那是因為在陽光明媚的夏天,你所享受到的所有美好的溫暖的陽光,只是一種

  • tiny percentage of the energy the sun is blasting out into space in your direction.

    太陽向你的方向發射的能量中的一小部分。

  • Basically, the sun is blasting a pure murder-hate beam of radiation straight at your dumb face,

    基本上,太陽是在向你那張蠢臉發射一束純粹的謀殺仇恨的輻射。

  • but good guy earth is there to shield you from the worst of it so all you feel is a

    但地球上的好人是有 保護你從最糟糕的它,所以所有的你覺得是一個。

  • nice warm ray of light and maybe some slight sunburn.

    很好的溫暖光線,也許還有些輕微的晒傷。

  • That's thanks to the earth's magnetic field, which is generated by the movement of molten

    這要歸功於地球的磁場,它是由熔融物的運動產生的。

  • iron and nickel in the earth's core.

    地核中的鐵和鎳。

  • All that moving and shaking of those metals in our molten core generates a massive electrical

    所有這些金屬在我們的熔核中的移動和搖晃都會產生巨大的電效應

  • current, which in turn creates a magnetic field which stretches out deep into space.

    電流,進而形成磁場,延伸到太空深處。

  • That magnetic field is in effect a shield, which deflects or traps harmful solar wind

    這種磁場實際上是一個盾牌,它能偏轉或捕捉有害的太陽風

  • and ensures that instead of your DNA being blasted apart, you'll at worst suffer a sunburn

    並確保你的DNA不會被炸開,最壞的情況是你會被晒傷。

  • from staying outside too long.

    以免在外面呆得太久。

  • But just how bad could it really be if the magnetic field were to collapse suddenly?

    但如果磁場突然崩潰,到底會有多糟糕呢?

  • That's a great question, and we're glad you asked.

    這是一個很好的問題,我們很高興你能問。

  • Four and a half billion years ago Mars had a thick, luscious atmosphere, and plenty of

    45億年前,火星上有濃厚的、華麗的大氣層和大量的...

  • liquid water to go around.

    液態水來往。

  • We can see evidence of huge lakes and rivers all over the surface of the planet, and we

    我們可以看到地球表面到處都是巨大的湖泊和河流的證據,我們也可以看到

  • know from studying the chemistry of the planet that it was once wrapped up in a thick atmosphere.

    從研究行星的化學成分中知道,它曾經被濃厚的大氣層包裹著。

  • Then, everything changed- in geological time scales, practically overnight.

    然後,一切都變了--在地質學的時間尺度上,幾乎是一夜之間。

  • The world that may have once held an advanced dolphin species capable of space flight- you

    這個世界可能曾經擁有一個先進的海豚物種 能夠進行太空飛行的世界--你

  • can't prove that didn't exist- is today only a dusty rock.

    不能證明它不存在--今天只是一塊塵封的石頭。

  • The killer?

    凶手?

  • Its magnetic field.

    其磁場。

  • Scientists still don't understand why Mars' magnetic field shut down, but they believe

    科學家們仍然不明白為什麼火星的磁場會關閉,但他們相信。

  • that it was due to its smaller size compared to earth, as well as the composition of its

    它是由於它的體積比地球小,以及它的組成。

  • core.

    核心:

  • The earth is bigger than Mars- almost twice as big- which means we have a large molten

    地球比火星大,幾乎是火星的兩倍,這意味著我們有一個巨大的熔融的。

  • core that would take longer to cool than Mars' own core.

    核心,比火星自己的核心需要更長的冷卻時間。

  • But that might only be part of the picture.

    但這可能只是一部分情況。

  • Rock is a great insulator, that's why our core has remained molten so long- but it's

    岩石是一個很好的絕緣體,這就是為什麼我們的地心能保持這麼久的熔化,但它是

  • not just heat from its original formation that's still keeping the core hot, but also

    不僅僅是其原始形成的熱量使核心保持熱度,還包括

  • the decay of radioactive elements inside our core that's helping to keep things nice and

    核心內放射性元素的衰變幫助我們保持良好的生活狀態

  • warm.

    溫。

  • Some scientists suspect that Mars lacked such heavy radioactive elements in its core, which

    一些科學家懷疑,火星的核心缺乏這樣的重放射性元素,這

  • would have led to a much faster cooling core than the Earth's own.

    會導致核心冷卻速度比地球本身快得多。

  • With a weakening magnetic field, the solar wind sandblasted Mars' atmosphere away, and

    隨著磁場的減弱,太陽風把火星的大氣層吹走了,而

  • eventually, its water.

    最終,其水。

  • Any life- such as space-faring dolphins- would have been bombarded by cosmic and solar radiation,

    任何生命,如太空航行的海豚,都會受到宇宙和太陽輻射的轟擊。

  • their DNA destroyed by high energy particles ripping it to pieces.

    他們的DNA被高能粒子摧毀,將其撕成碎片。

  • Unless that life moved deep underground, extinction was quick to follow.

    除非這種生命向地下深處移動,否則滅絕很快就會到來。

  • And now, it may happen here on Earth.

    而現在,它可能會發生在地球上。

  • The South Atlantic Anomaly has been closely monitored for decades, and has now split into

    數十年來,南大西洋異常一直受到嚴密監測,目前已抽成以下幾個部分

  • two 'valleys' that continue to move across the ocean and grow in size.

    兩個'山谷',不斷地在海洋上移動,並不斷擴大。

  • However, it's not quite all doom and gloom just yet, as new data shows that the anomaly

    然而,現在還不完全是厄運,因為新的數據顯示,異常的

  • may perhaps be part of a natural cycle that's been going on for millions of years.

    可能是數百萬年來自然循環的一部分。

  • We already know to expect anomalies in the Earth's magnetic field, and that's because

    我們已經知道要期待地球磁場的異常,那是因為

  • the molten core is not uniform in its iron and nickel content- who's motion generates

    鐵和鎳的含量並不均勻--誰的運動產生了鐵和鎳的含量

  • the magnetic field.

    磁場。

  • These irregularities in content will inevitably lead to irregularities in the strength of

    這些不規範的內容勢必會導致不規範的力度。

  • the magnetic field around the earth, and thus the Southern Atlantic Anomaly is born.

    地球周圍的磁場,南大西洋異常現象由此誕生。

  • There's no evidence that the earth's magnetic field ever weakened to the point of causing

    沒有證據表明地球的磁場曾經減弱到了導致:

  • a mass extinction event, so scientists are hopeful that the SAA will continue to evolve

    大規模滅絕事件,所以科學家們希望SAA將繼續進化

  • over time before eventually correcting itself.

    隨著時間的推移,最終才會自我修正。

  • For now the greatest danger that the SAA poses is to low earth satellites, which frequently

    目前,小靈通構成的最大危險是對低地衛星的威脅,因為低地衛星常常會

  • pass through the anomaly.

    通過異常點。

  • They must be careful to shut down sensitive electronics or suffer serious consequences-

    他們必須小心翼翼地關閉敏感的電子產品,否則將遭受嚴重後果--。

  • such as a Japanese satellite that destroyed itself when charged particles slipping through

    如日本的一顆衛星,當帶電粒子滑過時,它就會自毀。

  • the weakened magnetic field damaged some of its electronics.

    衰弱的磁場損壞了它的一些電子設備。

  • Even the space shuttle experienced the shutting down of laptops as it flew through the anomaly,

    就連航天飛機在飛過異常情況時,也經歷了筆記本電腦的關閉。

  • and the ISS regularly passes through it but thanks to its thick shielding suffers few

    國際空間站定期通過它,但由於其厚厚的屏蔽,很少受到影響。

  • if any ill effects.

    如果有任何不良影響。

  • While scientists don't expect the SAA to lead to a magnetic field collapse, there may be

    雖然科學家們並不指望SAA會導致磁場崩潰,但可能會有。

  • no telling how the Southern Atlantic Anomaly evolves in the future.

    不知道未來南大西洋異常會如何演變。

  • If things take a turn for the worse and the anomaly dips below the atmosphere- something

    如果事情變得更糟糕,異常點下降到大氣層以下...

  • it is already dangerously close to doing- it could spell disaster for any living beings

    它已經是危險的接近做 - 它可能會帶來災難的任何生物

  • in the geographic vicinity of the anomaly.

    在異常點附近的地理環境中。

  • Thankfully for now the anomaly is over the Southern Atlantic, but as it moves and grows

    值得慶幸的是現在這個異常點在南大西洋上空 但隨著它的移動和增長

  • it could eventually pass over heavy population centers.

    它最終可能會經過重度人口中心的上空。

  • What the Southern Atlantic Anomaly means for life on earth is still largely unknown.

    南大西洋異常現象對地球上的生命意味著什麼,目前還基本不清楚。

  • Before we're all disintegrated by an angry sun, go watch Worst Natural Disasters In Human

    在我們被憤怒的太陽瓦解之前,去看《人類最嚴重的自然災害》。

  • History, or click this other video instead!

    歷史,或者點擊其他視頻代替!

You're probably like billions of other people on the planet earth, happily going about your

你可能像地球上其他數十億人一樣,快樂地過著你的生活。

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B2 中高級 中文 磁場 地球 太陽 火星 生命 科學家

科學家發現神祕的異常現象,可能會毀滅地球。 (Scientists Discover Mysterious Anomaly That Could Destroy The Planet)

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    Summer 發佈於 2021 年 04 月 13 日
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