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‎遲暮時分

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‎NETFLIX 紀錄片系列

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‎揭露了地球與宇宙的連結

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‎一顆流星

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‎從太空深處飛來的古老岩石

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‎墜落地球

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‎裡頭蘊含著構成宇宙的化學元素

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‎世世代代

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‎海龜在海洋中漫游

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‎從牠們吃下肚的食物中取得宇宙元素

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‎海龜數億年來皆是如此

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‎每一個新世代

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‎將同樣的星塵回收

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‎用來孕育下一個世代

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‎誕生於大霹靂

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‎鑄造於恆星的心臟

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‎90種化學元素創造了萬物

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‎它們無盡的回收與重組

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‎書寫下宇宙的歷史篇章

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‎現在

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‎由同樣元素組成

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‎一隻隻海龜展開了牠們的新生

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‎也映照出恆星的生命週期

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‎劇名：基本元素

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‎澳洲的大堡礁上

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‎神奇的事情發生了

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‎在沙灘底下，經過50個時日

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‎來自宇宙各方的化學元素

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‎創造了生命

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‎元素相互結合

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‎形成了下一代的綠蠵龜

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‎龜蛋所提供的生命元素已經竭盡

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‎今天

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‎海龜寶寶將嚐到第一口空氣的滋味

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‎當哥哥姊姊爭先恐後爬入海中

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‎海龜小妹

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‎才破土而出

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‎想要長大成年

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‎牠必須游遍海洋，攝取化學元素

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‎這個旅途危險重重

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‎每個轉彎處都暗藏險機

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‎但對海龜寶寶來說

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‎海洋的召喚實在難以抗拒

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‎一窩上百隻幼龜中

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‎有時候只有一隻能存活

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‎有時全數喪生

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‎但儘管有風險

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‎海龜小妹知道，牠必須爬入海中

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‎牠抓準時機

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‎大膽邁步

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‎今天

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‎是牠的幸運日

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‎海龜小妹不停地游

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‎直到礁島遠遠拋在身後

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‎牠安全避開聚集在
‎沿岸淺水區的掠食動物

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‎隱身在廣闊無邊的大海中

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‎過上以原子為食的童年生活

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‎原子

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‎提到它的起源，就得倒轉宇宙的一生

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‎從宇宙初生時開始說起

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‎（大霹靂）

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‎從無到有，僅在一瞬間

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‎我們的宇宙自大霹靂中誕生了

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‎一開始

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‎宇宙只是一團濃密的熱霧

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‎但熱霧持續擴張的同時

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‎它也開始冷卻

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‎接著在你所能想像的最小規模中

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‎驚人的事情開始發生

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‎熱霧中凝聚出第一個原子

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‎氫原子

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‎宇宙中的第一種元素

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‎在大海裡

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‎這正是幼龜在尋找的目標

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‎牠們浮上水面

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‎在礁島的淺水區覓食

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‎這位是史黛拉

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‎成功離開沙灘
‎爬入海中的幸運兒之一

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‎牠已經比剛孵化時重兩千多倍

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‎迅速成長中

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‎漂流在海裡的生物都是牠的食物

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‎但其中一種元素牠攝取的最多

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‎氫

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‎在牠吃下的食物中
‎氫原子佔了超過一半的量

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‎也是所有生物體內含量最豐富的元素

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‎從魚類

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‎到無脊椎動物

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‎海葵和珊瑚

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‎在宇宙誕生之初形成的氫原子

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‎從恆星傳遞給行星

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‎從行星傳遞給動物

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‎再從獵物傳遞給掠食動物

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‎因此對史黛拉來說

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‎珊瑚礁的周遭水域危機四伏

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‎同樣在尋找氫原子的成年虎鯊

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‎一生都在獵食海龜

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‎史黛拉的主要防具是牠可靠的盔甲

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‎由鈣和磷強化的骨骼構造

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‎這兩個元素可以往回追溯…

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‎到宇宙生命的另一個關鍵時刻

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‎（135億年前）

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‎大霹靂後的三億年間

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‎宇宙中沒有行星或恆星

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‎是宇宙的黑暗時代

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‎幽暗之中

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‎捲成鬚狀的氫原子在宇宙中縱橫交錯

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‎接著，不可思議地

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‎重力將它們不斷聚攏

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‎第一顆恆星從中誕生

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‎這是宇宙的黎明

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‎這一刻，有了光明

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‎在這些初代恆星的內部深處

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‎開始發生奇妙的作用

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‎內部溫度與壓力極高

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‎導致新的元素被創造出來

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‎氫原子被迫結合，形成氦原子

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‎氫原子的融合釋放出能量

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‎帶來連鎖反應，製造出更重的元素

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‎包括創造生命的必要元素

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‎三個氦原子結合形成碳

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‎所有生命的基礎

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‎碳和氦結合形成氧

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‎我們呼吸的空氣

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‎氧原子結合形成磷

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‎接著是矽和鈣

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‎構成所有生物的元素

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‎都在初代恆星的核心中創造出來

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‎對史黛拉來說

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‎有些元素至關重要

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‎牠必須長途跋涉去尋覓

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‎（托列斯海峽，離家300公里）

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‎澳洲和巴布亞新幾內亞之間
‎有個溫暖的淺水區

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‎那裡是生機勃勃的海草天堂

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‎海洋中的大草原

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‎史黛拉大老遠游來這裡

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‎以取得海草中的神奇成分

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‎海草生長時

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‎會吸收從外太空沉落到海底的元素

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‎疾速生長的新芽葉富含鈣和磷

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‎為史黛拉提供牠所需的礦物質

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‎用來打造、保養牠的保護殼

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‎強化牠的盔甲

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‎以面對前方的試煉

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‎史黛拉的青春年華

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‎都將在大海中徘徊

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‎尋找誕生於恆星的原子

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‎牠走向成年的旅程

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‎與我們宇宙的故事相仿

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‎因為在大霹靂發生的30億年後

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‎宇宙也邁入成年期

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‎它進入恆星形成相當活躍的階段

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‎（108億年前）

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‎恆星一面成長

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‎一面受引力吸引，聚集成巨大的星系

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‎像是我們的銀河系

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‎在這些星系中

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‎每顆恆星所產生的化學元素

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‎都一一轉變成行星和衛星

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‎數十億年後

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‎這些化學元素便慢慢長成
‎我們今日所知的地球

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‎（萬那杜，離家兩千公里）

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‎史黛拉現在完全長大了

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‎身長一公尺多

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‎牠有厚實的甲殼，覆蓋著海藻

165
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‎是漫游珊瑚礁的理想偽裝

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‎牠現在與海洋合而為一

167
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‎來自恆星的原子

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00:21:59,320 --> 00:22:02,600
‎完全演化成海洋生物

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00:22:11,000 --> 00:22:13,120
‎這僅是地球生物的一個例子

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‎由宇宙精心塑造而成

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00:22:35,720 --> 00:22:39,000
‎史黛拉已經準備好
‎進入生命的下一個階段

172
00:22:43,680 --> 00:22:47,000
‎因為牠快要當媽媽了

173
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‎牠體內

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00:22:53,960 --> 00:22:56,480
‎孕育著100顆蛋

175
00:22:58,280 --> 00:23:01,080
‎這是牠這生中第一次懷孕

176
00:23:03,680 --> 00:23:07,640
‎是牠載於自己體內的珍貴星塵

177
00:23:15,760 --> 00:23:17,120
‎在整個珊瑚礁中

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‎原子都被組成新的生命

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00:23:25,480 --> 00:23:30,160
‎創造出地球上最豐富的生態系

180
00:23:35,920 --> 00:23:37,640
‎但我們的星球

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‎是異數

182
00:23:44,960 --> 00:23:47,120
‎在太陽系的其他地方

183
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‎同樣的元素

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00:23:49,240 --> 00:23:54,000
‎創造出來的世界卻完全不適合生命

185
00:23:58,480 --> 00:23:59,840
‎（水星）

186
00:23:59,920 --> 00:24:05,000
‎最靠近太陽的水星，碳含量豐富

187
00:24:07,880 --> 00:24:09,680
‎但這些碳無法創造生命

188
00:24:10,200 --> 00:24:11,480
‎（攝氏430度）

189
00:24:11,560 --> 00:24:13,800
‎而是烤成焦焦的一片

190
00:24:16,160 --> 00:24:19,920
‎這是個被星光烤焦的世界

191
00:24:22,520 --> 00:24:26,440
‎而在太陽系最遙遠的地方

192
00:24:26,520 --> 00:24:28,560
‎海王星的冰寒溫度

193
00:24:29,480 --> 00:24:33,520
‎導致碳和氫形成甲烷雲

194
00:24:36,680 --> 00:24:40,880
‎這令人窒息的氣體
‎讓海王星呈現出絢麗的藍色

195
00:24:46,640 --> 00:24:47,960
‎甚至火星

196
00:24:49,160 --> 00:24:51,960
‎雖然它與地球擁有相同成分

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00:24:54,320 --> 00:24:56,880
‎卻缺乏富含氧氣的大氣層

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00:24:57,520 --> 00:25:00,880
‎因此複雜的生命在這裡無法生存

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00:25:07,800 --> 00:25:12,080
‎只有地球擁有剛好的條件

200
00:25:18,320 --> 00:25:19,320
‎但就連在這裡

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00:25:20,120 --> 00:25:22,280
‎元素的爭奪戰也很激烈

202
00:25:24,200 --> 00:25:25,040
‎而且危機…

203
00:25:27,560 --> 00:25:29,040
‎永遠近在咫尺

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00:25:44,880 --> 00:25:48,400
‎幸好，史黛拉已經變成捉迷藏達人

205
00:26:29,920 --> 00:26:31,400
‎史黛拉暫時很安全

206
00:26:34,320 --> 00:26:37,320
‎但牠即將面臨生命中最大的挑戰

207
00:26:39,520 --> 00:26:42,280
‎返回大堡礁

208
00:26:43,920 --> 00:26:45,600
‎以及牠出生的島上

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00:26:49,480 --> 00:26:51,880
‎將牠的蛋產入沙灘中

210
00:26:58,880 --> 00:27:01,440
‎但牠在海洋中遊走了一生

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00:27:02,200 --> 00:27:05,600
‎意味著牠現在離家兩千公里遠

212
00:27:09,840 --> 00:27:11,520
‎史黛拉導航回鄉的能力

213
00:27:12,160 --> 00:27:14,760
‎是自然界的奇蹟之一

214
00:27:21,400 --> 00:27:22,760
‎在地球深處

215
00:27:23,600 --> 00:27:26,600
‎我們星球的核心產生一個磁場

216
00:27:28,840 --> 00:27:33,880
‎讓地球表面各處
‎都具有其獨特的地磁特徵

217
00:27:37,560 --> 00:27:39,120
‎當牠孵化時

218
00:27:39,200 --> 00:27:43,520
‎島上的特徵就烙印在史黛拉的腦中

219
00:27:46,200 --> 00:27:48,200
‎為了找到歸途

220
00:27:48,280 --> 00:27:51,600
‎牠會仰賴另一種化學元素

221
00:27:53,760 --> 00:27:56,880
‎把牠和地球核心連結起來的元素

222
00:28:00,400 --> 00:28:05,080
‎只有在恆星死去時才會產生的元素

223
00:28:10,680 --> 00:28:12,720
‎在銀河系臨近之處

224
00:28:13,720 --> 00:28:15,680
‎250萬年前

225
00:28:16,720 --> 00:28:20,520
‎一顆巨大恆星的核心發生了劇烈變化

226
00:28:25,280 --> 00:28:29,360
‎它終其一生都是靠核融合來驅動

227
00:28:35,880 --> 00:28:37,200
‎釋放出的能量

228
00:28:39,040 --> 00:28:41,440
‎創造出越來越重的元素

229
00:28:45,200 --> 00:28:47,760
‎直到核心變得炙熱無比

230
00:28:48,640 --> 00:28:49,880
‎恆星開始創造

231
00:28:51,640 --> 00:28:52,480
‎鐵

232
00:28:55,360 --> 00:28:58,200
‎這導致了根本性的變化

233
00:29:03,080 --> 00:29:06,040
‎因為創造鐵並不會釋放能量

234
00:29:07,920 --> 00:29:09,160
‎而是會消耗能量

235
00:29:15,880 --> 00:29:18,360
‎當越來越多的鐵製造出來

236
00:29:19,240 --> 00:29:22,760
‎它像傳染病般在核心蔓延

237
00:29:27,160 --> 00:29:29,160
‎吸收恆星的熱量

238
00:29:33,880 --> 00:29:34,880
‎掐住它的頸項

239
00:29:46,280 --> 00:29:48,560
‎一旦沒有熱源可以維持動力

240
00:29:52,840 --> 00:29:54,400
‎從這一刻起

241
00:29:57,480 --> 00:29:59,680
‎恆星就注定滅亡

242
00:30:11,600 --> 00:30:16,200
‎最終的大爆炸散發的亮度
‎可媲美100億個太陽

243
00:30:22,000 --> 00:30:27,080
‎這顆超新星將富含鐵的塵埃
‎推送到銀河系各處

244
00:30:35,120 --> 00:30:38,120
‎一路來到我們的星球

245
00:30:43,160 --> 00:30:44,280
‎就連現在

246
00:30:45,280 --> 00:30:50,280
‎每天都會有100噸的星塵
‎穿過地球的大氣層

247
00:30:53,080 --> 00:30:56,800
‎有些是太陽系形成過程中留下的

248
00:31:00,600 --> 00:31:04,480
‎有些是從遙遠的超新星吹過來的

249
00:31:08,400 --> 00:31:13,600
‎我們的星球和恆星之間的直接連結

250
00:31:19,680 --> 00:31:21,960
‎正是塵埃中的鐵

251
00:31:22,520 --> 00:31:25,400
‎讓史黛拉找到回家的路

252
00:31:33,520 --> 00:31:35,200
‎因為在牠的大腦深處

253
00:31:38,280 --> 00:31:43,600
‎某些特化細胞含有磁鐵礦晶體

254
00:31:44,520 --> 00:31:48,760
‎這種含鐵豐富的礦物質
‎能和地球磁場對齊

255
00:31:52,760 --> 00:31:53,680
‎像個羅盤

256
00:31:55,560 --> 00:31:57,680
‎為牠指引正確的方向

257
00:32:05,440 --> 00:32:11,680
‎讓史黛拉找到家鄉獨有的磁力指紋

258
00:32:19,480 --> 00:32:22,680
‎於是，由超新星鑄造出來的元素

259
00:32:30,360 --> 00:32:34,280
‎將引導牠穿越好幾公里
‎景色單一的海洋

260
00:32:48,600 --> 00:32:49,920
‎回到礁島上

261
00:32:53,800 --> 00:32:55,480
‎牠的出生地

262
00:33:08,120 --> 00:33:12,040
‎可是，其他生物也具有地磁導航能力

263
00:33:14,680 --> 00:33:16,480
‎像是虎鯊就有

264
00:33:19,600 --> 00:33:22,280
‎地磁帶牠們洄游到同一個礁島

265
00:33:26,560 --> 00:33:28,920
‎因為每年有幾個月

266
00:33:29,000 --> 00:33:32,600
‎數以千計的母龜會來這裡產卵

267
00:33:34,600 --> 00:33:37,880
‎這是地球上最盛大的綠蠵龜聚會

268
00:33:37,960 --> 00:33:39,960
‎其他地方都看不到

269
00:33:45,600 --> 00:33:47,320
‎當牠們抵達岸邊

270
00:33:49,080 --> 00:33:50,320
‎進食秀便開始了

271
00:34:03,800 --> 00:34:06,160
‎史黛拉必須等待適當時機

272
00:34:08,840 --> 00:34:10,040
‎尋找破口

273
00:34:12,160 --> 00:34:14,080
‎以避免遭襲

274
00:34:32,080 --> 00:34:33,800
‎等危險過去後

275
00:34:37,440 --> 00:34:39,080
‎牠才終於游上岸

276
00:34:52,280 --> 00:34:53,880
‎經歷了一場浩蕩旅程

277
00:34:57,080 --> 00:34:59,240
‎史黛拉爬上沙灘

278
00:35:00,840 --> 00:35:03,320
‎牠孵化的地方

279
00:35:28,040 --> 00:35:30,920
‎牠用盡一生收集而來的元素

280
00:35:36,600 --> 00:35:39,160
‎如今平平安安產在沙坑中

281
00:35:45,240 --> 00:35:46,960
‎史黛拉的任務完成了

282
00:35:47,520 --> 00:35:49,240
‎於是牠回到大海

283
00:35:52,880 --> 00:35:56,600
‎再次開始收集星塵

284
00:36:00,480 --> 00:36:01,800
‎牠生命的週期

285
00:36:03,640 --> 00:36:06,520
‎呼應了宇宙中最宏偉的週期

286
00:36:08,440 --> 00:36:11,920
‎恆星的生與死

287
00:36:22,480 --> 00:36:25,600
‎因為遠在銀河系的另一端

288
00:36:27,000 --> 00:36:30,800
‎無數個超新星的餘燼如今匯聚

289
00:36:30,880 --> 00:36:32,200
‎（獵戶座大星雲）

290
00:36:32,280 --> 00:36:34,480
‎形成一個巨大的星雲

291
00:36:41,280 --> 00:36:44,480
‎跨越了數十光年的一團星塵

292
00:36:48,120 --> 00:36:52,600
‎在這團星雲中，是下一代的恆星

293
00:36:53,840 --> 00:36:55,280
‎即將開始形成之處

294
00:37:06,800 --> 00:37:08,400
‎名叫原行星盤

295
00:37:10,400 --> 00:37:12,880
‎它們就像巨型的宇宙蛋

296
00:37:15,000 --> 00:37:17,680
‎每一顆都比我們的太陽系大

297
00:37:23,720 --> 00:37:26,640
‎在牠們由電離氣體構成的蛋殼中

298
00:37:28,560 --> 00:37:31,480
‎引力開始將星塵吸引在一塊

299
00:37:38,880 --> 00:37:42,400
‎同時，史黛拉蛋中的星塵

300
00:37:45,440 --> 00:37:47,560
‎也開始慢慢成形

301
00:37:56,200 --> 00:38:01,800
‎牠收集而來的元素逐漸轉變

302
00:38:08,280 --> 00:38:11,800
‎形狀開始有了幼小生物的模樣

303
00:38:24,280 --> 00:38:25,640
‎在原行星盤中

304
00:38:27,840 --> 00:38:30,240
‎氫、氦等氣體

305
00:38:33,120 --> 00:38:35,680
‎也正在餵養一顆胚胎期的恆星

306
00:38:44,880 --> 00:38:46,680
‎蛋中原先的胚胎

307
00:38:49,080 --> 00:38:51,080
‎如今長成了一隻龜寶寶

308
00:38:55,200 --> 00:38:58,880
‎有殼，有鰭肢，還有嘴喙

309
00:39:02,880 --> 00:39:04,680
‎這些元素重新塑造

310
00:39:08,080 --> 00:39:10,280
‎蛻變為海洋生物

311
00:39:15,160 --> 00:39:16,120
‎在原行星盤中

312
00:39:17,000 --> 00:39:20,200
‎新生恆星也即將發育完成

313
00:39:21,480 --> 00:39:24,800
‎從前一世代的餘燼中重生

314
00:39:26,120 --> 00:39:27,440
‎它的光芒照亮了

315
00:39:27,520 --> 00:39:30,000
‎在軌道上一一成長的行星家族

316
00:39:34,200 --> 00:39:35,320
‎新的世界

317
00:39:36,240 --> 00:39:40,280
‎也有可能是新的生命家園

318
00:39:48,280 --> 00:39:49,920
‎在沙坑底下

319
00:39:51,240 --> 00:39:52,760
‎同樣的星塵

320
00:39:54,080 --> 00:39:58,800
‎傳承自無數個恆星與海龜世代

321
00:40:00,880 --> 00:40:03,200
‎將展開另一段旅程

322
00:40:08,160 --> 00:40:09,560
‎每一個新生命

323
00:40:11,080 --> 00:40:15,400
‎都與宇宙的起源一脈相承

324
00:40:20,840 --> 00:40:26,200
‎每一個新故事
‎都始於上一個故事的結束

325
00:40:34,880 --> 00:40:38,880
‎於是，《我們的浩瀚宇宙》下集待續

326
00:40:40,760 --> 00:40:43,000
‎主題是地球最珍貴的資源

327
00:40:46,280 --> 00:40:47,120
‎水

328
00:40:48,920 --> 00:40:52,800
‎一個大象家族將踏上危險的尋水之旅

329
00:40:57,000 --> 00:40:59,360
‎牠們的旅途，每分每秒都很精彩

330
00:41:01,680 --> 00:41:04,800
‎正如水的旅途，跨越廣袤的太空

331
00:41:04,880 --> 00:41:06,440
‎來到我們的星球

332
00:41:10,640 --> 00:41:13,840
‎但為什麼地球是太陽系中

333
00:41:14,320 --> 00:41:17,240
‎唯一表面被水覆蓋的世界？

334
00:41:18,600 --> 00:41:21,960
‎為什麼水對生命來說如此重要？

335
00:42:06,800 --> 00:42:11,160
‎字幕翻譯：顏志翔