在太空高处， From high in space,
我们能看到国家 we can see the familiar shapes of countries...
和大陆熟悉的形状 ..and continents.
如今，卫星影像 But now, satellite images
使我们清晰地看到 allow us to look closer...
地球上每一块拼图中的 ..revealing our planet as a patchwork
非凡的画卷 of extraordinary landscapes...
这景象源自自然之力 ..created by natural forces...
动物 ..by animals...
及我们。 ..and by us.
卫星图像帮助我们深入 了解地球的健康状况。 These patterns give an insight into the health of our planet.
每一条线，每一个图案背后 Behind every line and every pattern...
都有一个故事。 ..there's a story.
世界各地的 Around the world...
热带海岸线被珊瑚礁环绕。 ..tropical coastlines are fringed with coral reefs.
乍看上去， At first glance,
它们的形状随意。 their shapes seem random.
经过仔细观察就会发现 But a closer look reveals a pattern...
深色珊瑚周围的浅色圆盘。 ..pale discs surrounding patches of dark coral.
如今，通过卫星图像 Using satellite images,
科学家们发现 scientists have now found these shapes
全球的珊瑚礁上都呈现这种形态。 on coral reefs across the globe.
研究它们的形成方式 Understanding how they are formed
为我们深入了解海洋生态 offers a new insight into the health of our oceans...
及其赖以为生动物，提供了新的视角。 ..and the animals that call them home.
依靠珊瑚礁为生的鱼，用不同的策略 For fish that live on coral reefs, there are different strategies
觅食。 for finding food.
一部分呆在珊瑚礁附近 Some stay close to the reef...
以珊瑚虫为食。 ..feeding from the coral itself.
其它鱼冒险 Others venture out
深入珊瑚礁周围的海床。 to the surrounding seabed.
离开珊瑚礁觅食 But feeding in the open...
非常危险。 ..can be dangerous.
掠食者，如东星斑 Predators, like coral groupers...
鲨鱼 ..and sharks,
在珊瑚礁周围巡弋。 patrol the reef perimeter.
因此小鱼只能远离珊瑚 So small fish only feed as far from the coral
到绝对安全的 as is absolutely necessary...
地方进食。 ..staying within easy reach of safety.
随着时间的推移，每片珊瑚周围的海床上都难觅食物 Over time, the seabed around each patch of coral is stripped of food...
创造出一片环状不毛之地， ..creating rings of bare sand
科学家称之为放牧光环。 that scientists call grazing halos.
它们显示礁盘周围的掠食者和猎物都很健康。 They are a sign that both predator and prey populations are healthy.
光环消失的地方 But where this pattern disappears,
可能预示着掠食者的数量正在下降。 it may be a sign that predator numbers are falling.
这些光环帮助科学家们 These halos now allow scientists
从太空监视珊瑚礁的微妙平衡。 to monitor the reefs' delicate balance from space.
摄像卫星可以俯视地球上每一个角落， Satellite cameras can now look down on every part of our planet...
帮助我们探索地球上最偏远的栖息地。 ..allowing us to explore Earth's most remote habitats.
非洲中部的刚果丛林。 The Congo jungle in central Africa.
这片森林是千万种动物的家园， This forest is home to thousands of animal species.
从太空向下望去，这一偏远的角落 But from space, it appears as little more than a blanket of green...
宛如一条绿色的毯子。 ..except, that is, if we look down over one remote corner.
卫星图像发现奇特的图形 Satellite images reveal a strange shape...
有几十条小路向周围的森林延伸。 ..with dozens of trails leading in from the surrounding forest.
强壮的刚果原住民开拓这片区域。 This shape was created by the Congo's mightiest residents.
他们大部分时间隐居在茂密的丛林里 They spend most of their lives hidden in the thick jungle...
象群要行进几百公里，才能抵达这里。 ..but travel hundreds of kilometres to gather here.
丛林象 Forest elephants.
ELEPHANTS TRUMPET
当地人称这里为“Dzanga Bai” Locals call this place Dzanga Bai...
大象的村落。 ..the Village of Elephants.
丛林象大部分时间生活在小族群里。 Forest elephants spend most of their lives in small family groups.
然而在这，每天多达150头大象 But here, up to 150 individuals
汇聚一隅。 are drawn together every day.
它们以坚硬的叶子和丛林果实为食， Their diet of tough leaves and jungle fruit is lacking
缺乏健康所需矿物质。 in vital minerals.
因此一代又一代的大象，来到森林中的这片空地 So generations of elephants have come to this one spot in the forest...
这里富含钠、钾和钙的沉积物 ..where deposits of sodium, potassium and calcium
藏在水面之下。 lie just below the surface.
大象用它们的长牙，挖开地上的淤泥， Using their tusks to dig at the soil
再用长鼻伸入水中吸取 and their trunks to blow into the water...
这些大象开辟了一片矿区， ..these elephants have excavated a network of boreholes...
帮助它们获取地下的矿物质。 ..allowing them to extract these minerals from under ground.
几百年来，大象不停的挖掘 Over hundreds of years, the constant digging
导致空地越来越大。 and movement of elephants has caused this clearing to grow.
ELEPHANT TRUMPETS
如今，这里有500多米长， It's now more than 500 metres long...
从太空俯瞰，清晰可见。 ..and clearly visible from space.
一头年轻的丛林象，首次造访Dzanga Bai For a young forest elephant, a first visit to the Bai
一切都是那么新奇。 is full of new experiences.
在成年象尽情的喝着泥汤时， While the adults drink effortlessly...
它仍在抓挠自己的鼻子。 ..she's still getting to grips with her trunk.
母象抚育幼象，长达四年， Infants are raised by their mothers for up to four years...
学习吸吮矿坑里的水， ..and learning how to drink from these wells
是它一生中重要的课程。 is one of life's vital lessons.
小象大部分时间，和母亲呆在一起， For a calf who spends most of her time with her mother...
来这里聚会，是一个难得的社交机遇。 ..this is a rare opportunity to socialise.
这个年纪构成的关系，可以持续一生。 Relationships formed at this young age can last a lifetime.
它们玩耍时 But while they play...
象妈妈需时刻保持关注。 ..mothers must keep a close watch.
DEEP TRUMPETING
丛林雄象同样被这里吸引。 Male forest elephants are also drawn here.
聚会是寻找另一半的理想场所。 This gathering is the ideal place to find a fertile female.
雄象在空地上横冲直撞， To display their size and strength...
炫耀它们庞大的身躯和强健的体态 ..bull elephants charge around the clearing.
如果不止一头雄象出现， And if more than one male appears...
对抗情绪就会加剧。 ..tensions run high.
年轻雄象会被成年雄象杀死。 Young forest elephants have been killed here by charging males.
TRUMPETING
母象保护着孩子，躲避到森林的安全地带。 Mother retreats to the safety of the forest.
她孩子的一生中， Her baby should be able to return
都会回到这片区域。 to this clearing throughout its lifetime.
大象的未来叵测， But these elephants face an uncertain future.
在过去的20年间， In the last 20 years,
世界上，超过一半的丛林象， more than half of all the forest elephants in the world
因象牙死于偷猎者之手。 have been killed by poachers for their ivory.
天眼可给与帮助。 But cameras in space may be able to help.
现在，科学家利用卫星图像 Scientists can now use satellite images
确定丛林象活动的其它区域， to identify other clearings used by forest elephants...
保护它们不受偷猎者的伤害， ..protecting them from poachers...
让大象聚会免受干扰。 ..and preserving these unique gatherings.
无需大如巨象， But you don't need to be as big as an elephant
太空中亦可看见你的活动痕迹。 to make a mark visible from space.
澳大利亚南部 In South Australia,
内陆布满了，神秘的色斑， the outback is speckled with mysterious light patches...
狭窄的小路连接它们， ..interlinked with narrow trails...
出自意想不到的建筑师之手 ..the work of an unlikely architect.
它是只南澳毛鼻袋熊 He's a southern hairy-nosed wombat...
澳大利亚这一地区独有的有袋动物。 ..a marsupial only found in this part of Australia.
露出腹部较薄的皮毛， Exposing the thinner fur of his belly
帮助它在正午的酷热中，保持凉爽。 helps to keep him cool as he waits for the midday heat to pass.
后面还有工作要做。 Then there's work to be done.
春回大地 It's springtime,
时光流转，气温上扬。 and with each passing day temperatures are steadily rising.
几周后， In just a few weeks,
气温逼近50摄氏度。 it could be close to 50 degrees Celsius.
裹着厚厚的毛皮大衣 Wrapped in a thick fur coat,
身处高温是致命的。 this heat could be deadly.
然而袋熊有办法。 But the wombat has a solution.
短而锋利的爪子，强而有力的四肢， With sharp claws and short, powerful limbs,
它为挖掘而生。 he's built for digging.
相较地表，地下温度低15度， It's 15 degrees cooler below ground...
洞穴是躲避夏季烈日的避暑圣地。 ..a hiding place from the worst of the summer sun.
高温不是袋熊面临的唯一威胁。 But high temperatures aren't the only threat wombats face.
生存环境的破坏与入侵物种的侵扰， Habitat loss and the impact of invasive species
致使袋熊数量，在20世纪初暴跌。 caused wombat numbers to plummet in the early 20th century.
不过现在，利用卫星图像定位袋熊的洞穴， But now, using satellite images to locate their burrows...
科学家们发现它们的数量正在反弹， ..scientists can see they're bouncing back...
如今，约一百万只南澳毛鼻袋熊 ..with around one million southern hairy-nosed wombats
生活在澳洲腹地。 now living in this corner of Australia.
南美 In South America,
广袤的大地，覆盖着茂盛的绿色热带森林。 vast areas are covered with lush, green tropical forest.
然而在巴西东北部海岸， But on the coast of north-east Brazil,
森林被一种完全不同的地貌取代。 the forest is interrupted by a very different landscape.
沙地吞噬了植被。 Vegetation is being swallowed up by sand.
砂砾经过海水千年的冲刷，并被吹向内陆。 Washed up by the ocean and blown inland over thousands of years...
形成面积超过800平方公里的沙丘。 ..a field of sand dunes covering more than 800 square kilometres.
拉克伊斯·马拉赫塞斯 The Lencois Maranhenses.
烈日炙烤着砂砾， The surface of the scorched sand
表面可达80摄氏度。 can reach 80 degrees Celsius.
在这里生存，坚硬的外壳是必备之物。 To survive here you have to be made of tough stuff.
丛林龟 A Pininga turtle.
她离开身后的森林 She's left the surrounding forest behind...
深入沙丘的腹地 ..and is making her way into the heart of this desert...
爬行数日 ..walking for days
顶着炎炎烈日 beneath the burning sun...
每走一步，都会消耗它宝贵的能量。 ..each step on the soft sand sapping away her precious energy.
没有食物和水，它活不了多久。 Without food and water, she won't survive for long.
然而它的远游，事出有因。 But she's made this journey for a reason.
THUNDER RUMBLES
现在是雨季。 It's the wet season.
雨水改变着 And in these dunes,
沙丘的一切。 the rain changes everything.
从太空我们才能一窥地貌变化的规模。 Only from space can we see the scale of the transformation.
每年这时，雨水淹没了沙漠， Once a year, rainwater floods the desert...
形成数千淡水泻湖。 ..forming thousands of freshwater lagoons.
沙丘之下，一层坚硬的岩石，阻止雨水流失。 Beneath the sand, a layer of solid rock stops rainwater escaping...
构成一幅，不同于地球 ..creating a landscape
其它地方的美景。 like nowhere else on Earth.
丛林龟因此而来。 And that's just what she came for.
随着泻湖的成长， As the lagoons grow,
鱼儿随河水游入池塘。 fish make their way into the pools from surrounding rivers.
为它提供数星期的食物。 They'll keep her fed for weeks.
但雨水终会干涸。 But this water won't last forever.
热带阳光的曝晒，泻湖很快就会蒸发。 In the tropical sun, these lagoons will soon evaporate.
在太阳落山之后， Dozens of desert species now race
几十种沙丘物种争先恐后 to make the most of the life-giving water...
奔向这片生命之源。 ..even after the sun has set.
一只四眼蛙。 A tiny four-eyed frog.
它一直躲在凉爽的沙粒之下。 He's been lying dormant in the cool sand.
雨水播撒着暧昧的气息，唤醒了它原始的萌动。 But the rains have triggered the breeding season.
成千上万的四眼蛙和它一样骚动起来。 And there are thousands just like him.
世界其它地方， In other parts of the world,
青蛙要迁移数公里，才能到达它们的爱巢。 frogs migrate for kilometres to reach their breeding pools.
然而在这，雨水直接淌到它们近前。 But here, the water has come to them.
泻湖四周，青草丛生， Around the lagoons, grasses have sprung up,
为欢愉的伴侣，提供庇护所。 creating sheltered spots for breeding.
不仅仅吸引了四眼蛙。 And it's not only four-eyed frogs who come here.
七种不同种类的青蛙和蟾蜍 Seven different species of frogs and toads
都希望自己的血脉得以延续。 are all hoping to breed.
CROAKS
ANIMALS AND BIRDS CALL
要费把子力气，才能让求爱之歌在嘈杂的噪声中传播。 It's a struggle to make yourself heard above the noise.
最终，四眼蛙找到了彼此。 Eventually, the four-eyed frogs find each other.
每对爱侣都能产一千多个卵 Each pair may produce more than a thousand eggs...
这段时期 ..an explosion of new life
新生命激增。 And just in time.
雨季过后，巴西一隅， When the rains ease, the lagoons begin to disappear...
拉克伊斯·马拉赫塞斯的沙丘上，泻湖逐渐消失。 ..and sand reclaims this corner of Brazil.
世界各地，自然之力 Around the world, the forces of nature
刻画着神秘而有趣的图案， create mysterious and intriguing patterns
仅能从太空一窥究竟。 visible only from space.
风堆起了的沙丘形成 Star-like shapes in the Sahara desert
撒哈拉沙漠中的星状图案。 are sand dunes whipped up by the wind.
西非，一组同心圆 In West Africa, a ring of concentric circles...
由渗出地壳的岩浆构成。 ..formed by magma forcing its way through the Earth's crust.
伊朗的盐漠， And in Iran's salt desert,
这些抽象的漩涡是远古海洋的遗迹。 these abstract swirls are the remains of an ancient ocean...
历经数百万年的风雨，才雕琢而成。 ..sculpted by the wind over millions of years.
亚马逊雨林， In the Amazon rainforest, hundreds
数以百计的江河串流其间。 of rivers wind through the jungle.
它们的河岸 Alongside them...
呈现奇怪的马蹄形弧线。 ..are strange arcs and horseshoe shapes.
30多年来拍摄的卫星图像， Satellite images taken over 30 years
揭示这些弧线是如何形成的。 reveal how these patterns are formed.
当江河在丛林中冲出路径 As the water forges a path through the jungle...
切断河流的弯曲处，将它留下， ..bends in the river are cut off and left behind...
形成孤立的牛轭湖 ..creating isolated oxbow lakes...
就像秘鲁北部的埃尔多拉多湖 ..like El Dorado Lake in northern Peru.
当地土著及野生动物的 A special place for wildlife
专属之地。 and for local people.
CHILD CHATTERS
艾薇拉九岁了。 Elvira is nine years old.
她和朋友们住在临近 She and her friends live in a small village
埃尔多拉多湖的一个小村庄里。 close to the oxbow lake.
她们被动物深深吸引 They're fascinated by animals...
最受欢迎的动物，也许最难以捉摸。 ..and their favourite is perhaps the most elusive...
亚马逊海牛 ..the Amazonian manatee.
海牛的一生隐居在 Manatees spend their lives hidden
丛林河流的浑水里， in the murky water of jungle rivers...
浮出水面只是为了呼吸空气， ..surfacing only briefly to take a breath
或进食浮游植物。 or to feed on floating plants.
亚马逊的许多地方，土著猎杀海牛，以获取肉食， In many parts of the Amazon, manatees are hunted for their meat,
致使它们数量下降。 and their numbers are declining.
艾薇拉从未见过海牛。 Elvira has never laid eyes on a manatee.
艾薇拉：瓦莫斯，奇卡斯！ ELVIRA: Vamos, chicas!
然而这一切都将改变。 But that's all about to change.
牛轭湖拥有河流的所有优点 The oxbow lake has all the benefits of a river...
它的水域独立且安全 ..but its isolated waters are still and safe...
为保护海牛的再生，提供了家园。 ..perfect for manatees in need of a second chance.
它在这里
我看到它了，我也看到了。
对艾薇拉来说，这是一个机遇 For Elvira, it's an opportunity
能够面对面的观察 to finally come face-to-face
她最喜欢的动物。 with her favourite animal.
它有小胡子。
能触摸真实的海牛，感觉真好。
这头海牛是少数幸运儿之一。 This manatee is one of a lucky few.
由一个国际专家团队，把它从非法囚禁中解救出来， They were rescued from illegal captivity and rehabilitated
帮它恢复了健康。 by an international team of experts.
它们现在没事了， They're now fit and well enough
可以回归自然了。 to be released.
无线发射器监控海牛的身体状况， Radio tags will allow their progress to be monitored...
在牛轭湖，它们的新生活开始了。 ..as they start their new life in the safety of the oxbow lake.
再见，海牛！
我希望它们交很多朋友，在这愉快生活。
通往牛轭湖的蜿蜒水道 The twists and turns that lead to oxbow lakes
是典型的丛林河流，流速缓慢。 are typical of slow jungle rivers meandering over flat ground.
世界各地的每条江河， But across the globe, each river
都有自己的特点。 has its own unique character.
在埃及，尼罗河为沙漠带来了生机 In Egypt, the River Nile brings life to the desert...
河水沿岸宛若翠绿的丝带 ..creating a ribbon of green.
喜马拉雅山谷的深处， At the base of the Himalayas,
数百条溪流汇入雅鲁藏布江 the Brahmaputra River pulls in water from hundreds of streams
江水从山上奔腾而出 pouring out of the mountains...
构建了一个10公里宽的复杂水道。 ..creating a complex channel 10km wide.
美国，犹他州。历经万年 In the USA, the movement of Utah's Green River
川流不息的绿河 has carved out deep canyons
凿出深深的峡谷。 over millions of years.
中国东部 In eastern China...
五大江河交汇 ..five major rivers converge...
形成一个如此巨大的淡水体系 ..to form a body of fresh water so huge
唯有在太空，才能一窥全貌。 that the only way to see it in its entirety is from space.
鄱阳湖 Poyang Lake.
它不是普通的湖。 This is no ordinary lake.
每年旱季来临， Each year, when the dry season arrives...
鄱阳湖收缩水面。 ..it begins to shrink.
三个月内，湖面几乎完全消失了， Within three months, it almost totally disappears...
露出大量富含营养的泥土， ..leaving behind huge areas of nutrient-rich mud...
以及数百个浅洼。 ..and hundreds of shallow freshwater pools.
沧海桑田的转变预示着 This transformation is the cue
地球上，数量最庞大的移民，即将到来。 for one of the greatest migrations on our planet.
50万只候鸟从亚洲各地蜂拥而至。 Half a million birds flock here from all across Asia.
然而没有一种鸟 But none have travelled further
比极度濒危的白鹤走得更远。 than the critically endangered Siberian cranes.
始于俄罗斯北部，飞行近5000公里， This is the end of a month-long journey from northern Russia,
历时一个月，来到这里。 almost 5,000 kilometres away.
白鹤来到鄱阳湖，参加独特的聚餐。 They've come for a unique feeding opportunity.
BIRDS CALL
浅水暴露水生植物， The falling water has revealed
富含营养的根。 the nutritious roots of aquatic plants.
长途跋涉后的白鹤，开始大快朵颐。 The cranes gorge themselves after their long journey.
它们不喜欢与他人分享。 And they aren't interested in sharing.
多数家庭 Among the many families
都是两父母带着五个月大的孩子。 are two parents with their five-month-old offspring.
幼鹤的第一次迁徙无可挑剔。 He's successfully completed his first migration.
长路漫漫，飞行了近5000公里， But 5,000 kilometres was a long way to fly
年轻的翅膀经受了考验。 on young wings.
它饥肠辘辘，向父母乞食。 He begs for food.
但妈妈 But his mother...
漠然视之。 ..ignores him.
每只鸟都忙着填饱自己。 It's every bird for themself.
从太空俯视， And from space,
原因显而易见。 it's clear to see why.
随着旱季的持续，缩小浅洼的面积， As the dry season progresses, the pools shrink...
白鹤们争抢着最好的餐厅。 ..increasing competition for the best feeding spots.
BIRDS CALL
一位入侵者进入家族的领地。 A rival has strayed onto the family's patch.
引起警觉。 This cannot go unchallenged.
公鹤摆好架势，迎击盗匪。 Father squares up to the intruder.
双方互不相让。 Neither is willing to back down.
白鹤有锋利的爪子。 Their claws are razor-sharp.
15厘米的长喙 15-centimetre-long beaks
都成为它们的武器。 become weapons.
入侵者 The intruder...
被赶跑了。 ..is seen off.
然而幼鹤还是没有饭吃。 But the youngster still hasn't been able to get a meal.
它唯有一事可做。 There's only one thing for it.
终于学会，养活自己的办法。 He finally works out how to feed for himself.
如今全家都在为返回 The whole family can now fuel up for the return journey
西伯利亚努力。 to Siberia.
四个月后，汇入的江河使鄱阳湖水位上涨， After four months, the rivers that flow into Poyang begin to rise again...
白鹤踏上了漫漫返乡路。 ..and the cranes start the long flight home.
非凡的变迁， An epic journey...
引发史诗般的征程。 ..triggered by a remarkable transformation.
水来水往 The coming and going of water
刻画了地球上最绚丽的风景。 makes for some of the most beautiful landscapes on Earth.
抵达海边的河流 Rivers arriving at the coast
运载大量的沉积物 deposit vast quantities of sediment...
使三角洲向大海 ..creating deltas that reach out
延伸。 into the ocean.
俄罗斯北部 In northern Russia,
勒拿河分岔成数千条独立的水道。 the Lena River forks into thousands of separate channels.
墨西哥湾 And in the Gulf of Mexico,
密西西比河三角洲 the Mississippi River Delta
覆盖10000平方公里。 spans 10,000 square kilometres.
但世界上最大的三角洲 But the largest delta in the world
位于孟加拉湾。 lies in the Bay of Bengal.
这迷宫般的水道 This maze of waterways
地处孙德尔本斯。 is the Sundarbans.
一天两次，潮水改变水域的颜色 Twice a day, it's transformed by the tide...
时蓝 ..blue...
时棕 ..to brown...
当潮水退却， ..as the tide falls,
露出泥土。 exposing the mud below.
河水中的泥沙，被红树林的树根截留。 Silt from river water is trapped by mangrove roots...
形成了独一无二的栖息地。 ..creating a habitat like no other.
胆小的花斑鹿 A home for timid chital deer...
成帮的猴群 ..troops of macaques...
行踪难觅的孟加拉虎 ..elusive Bengal tigers...
三百多万人 ..and over three million...
以此为家。 ..people.
卜霍本和他的儿子赫里多伊 Bhoben and his son Hridoy live
生活在桑德尔本斯北部。 in the north of the Sundarbans.
卜霍本是渔民。 Bhoben is a fisherman.
他教授儿子祖传手艺。 He's teaching his son the family trade.
然而他们不用鱼线和鱼竿捕鱼。 But they won't be fishing with lines or poles.
他们反而用 Instead, they'll be using
油光水滑的水獭。 ten smooth-coated otters.
从六世纪开始，村里的人 The people here have been fishing together with otters
一直用水獭捕鱼。 since the sixth century.
孙德尔本斯的野生水獭数量正在减少。 Wild otter populations are declining in the Sundarbans.
这类特殊圈养，也许对水獭种群繁衍，至关重要。 This specially bred captive population could be crucial
使物种得以延续。 for the survival of the species.
对主人来说，它们非常珍贵。 And they're extremely precious to their owners.
我们喂他们，自己少吃一点也无所谓。
一天中，水獭只能在特定的时间捕鱼，必须非常精准。 But they can only fish at very precise times of the day.
他们必须等到涨潮 They have to wait for the tide.
当潮水很高的时候， While it's high,
数千个小水湾，纵横交错的穿过红树林。 thousands of tiny inlets crisscross through the mangrove forest.
河水影响着地貌， Water dominates the landscape,
给鱼提供很多藏身地。 giving fish plenty of places to hide.
从太空 But from space,
我们可以观察潮汐的变化。 we can watch the tide turn.
泥浆替代了水。 Water is replaced with mud.
在低潮期， And at the very lowest tide,
鱼被迫游进现存的几片水域。 fish are forced into the few remaining stretches of water.
水獭开工了。 And the otters get to work.
它们通过胡须敏锐的触感，探测鱼的行踪。 Their sensitive whiskers detect the movement of fish...
并将其赶到网中。 ..and they flush them towards the nets.
年轻的水獭随意的游来游去。 Young otters swim freely.
它们应该向老水獭学习捕鱼， They're supposed to be learning from the adults,
但心思散漫。 but it's easy to get distracted.
爸爸
它们抓到一条蛇。
它们能吃蛇吗？
没事。
水獭捕到的鱼，比只用渔网多两倍。 The otters bring in up to twice as many fish as using nets alone.
人们拿走了它们的收获。 And they take their cut.
十只水獭每天吃八公斤鱼。 Ten otters can eat eight kilos of fish every day.
然而，渔民的生活难以为继。 But it's getting harder for fishermen here to make a living.
大规模捕捞和日渐严重的工业污染 Large-scale fishing and pollution from growing industry
致使孙德尔本斯的鱼群锐减。 are decimating the fish stocks in the Sundarbans.
以前有200条船， From over 200,
现在仅剩8条，还使用这种古老的捕鱼技能。 this is now just one of eight boats keeping this ancient skill alive.
潮汐变换， The tide turns,
渔夫们随流而返。 and the fishermen follow the water home.
人类总能找到生存的方法 Humans have always found ways to survive
与地球自然环境融为一体。 alongside our planet's natural landscapes.
大约在一万年前， But around 10,000 years ago,
人类尝试改造生活环境。 we began to create patterns of our very own.
大自然混沌的曲线旁边， Alongside nature's chaotic curves,
出现了有序的图案， more ordered shapes appeared...
设计精确 ..designed with great precision...
帮助人类养育自己。 ..to help us feed ourselves.
起初，农业只能 At first, farming could only take place
与自然水源相伴。 alongside natural water sources.
如今，即便在最干燥的沙漠里 But now, even in the driest desert,
农作物依然茁壮成长。 crops are being grown.
那里，一类形状成为主流。 And one shape has come to dominate.
农场使用旋转喷头 By using rotating sprinklers,
喷洒圆形田地，比其它形状田地更高效。 farmers can water a circular field more easily than any other shape.
美国中西部 In the American Midwest,
这类灌溉圆圈，绵延数百公里。 these irrigation circles stretch for hundreds of kilometres.
工业农场会赶走野生动物。 Intensive farming like this can force out wildlife.
然而不管灌溉圈挤得多紧， But no matter how tightly circles are packed together...
它们之间总有空隙。 ..there'll always be gaps left between them.
密苏里州，鼓励农民保持原生态 In Missouri, farmers are encouraged to keep these spaces wild...
标注动物栖息地 ..creating pockets of habitat for animals...
如白喉鹌鹑。 ..like the bobwhite quail.
在灌溉圈的边缘， On the edge of this circle,
仅存的空间，刚好满足 just enough space has been left
鹌鹑养育雏鸟。 for quail to raise their chicks.
饥饿的小嘴，嗷嗷待哺， With hungry new mouths to feed,
家长们为寻找食物疲于奔命。 families are always on the move in search of food.
小鹌鹑非常好奇， Young chicks are inquisitive -
它们渴望探索新天地。 keen to explore their new world.
在茂密的灌木从中， But in the thick undergrowth,
家长发现很难监护所有雏鸟。 parents can find it difficult to keep an eye on all of them.
CHICK CHIRPS
有别的家伙 And there are others here
在这觅食。 looking for a meal.
红隼要养育自己的孩子。 Kestrels have their own young to feed.
妈妈们知道最好的躲避办法， Mothers know the best thing to do
就是蹲下别动。 is hunker down and stay still.
一只落单的小鹌鹑， But a lone chick's instinct
出于害怕继续奔跑。 is to keep running.
它跑进灌溉圈里， She's inside the circle of crops.
一个陌生的世界。 An alien world.
成行的大豆， Row upon row of soybeans
排列成直径一公里宽的圆圈。 arranged in a circle almost a kilometre wide.
盛暑时节， There's nothing to eat
这里没吃也没喝。 and, in the height of summer, nothing to drink.
干燥的环境，同样不利于庄稼生长。 Dry conditions are bad for the crops, too.
在密苏里州，人类找到了解决办法， But here in Missouri, they have a solution for that.
从地下深处抽取数百万加仑的水 Millions of gallons of water pumped from deep underground...
沿着300米的旋转长臂，灌溉到田里。 ..and piped along a rotating arm 300 metres long.
拯救庄稼的设备， A life-saver for the crops...
威胁到雏鸟的性命。 ..but potentially deadly for a quail chick.
就算没有工业农场，生活也有危险。 Life beside industrial farming comes with dangers.
每一小块旷野， But each small patch of wild habitat
都是养育野生动物的绿洲。 can be an important oasis for animals.
现在，美国有125000个圆形农田 There are now 125,000 circular fields in the USA.
谁知道在其之间的空地上， Who knows what dramas may be unfolding
会上演什么戏剧呢？ in the spaces left between them?
如今，地球上超过三分之一的陆地 Human agriculture now covers more than one third
被人类农田覆盖。 of the Earth's land surface.
在加上住宅和工厂占用的土地， Add to that the space taken up by our homes and our industries
超过一半的大地， and humanity's impact can now be seen on more than half
受人类影响而改变。 of the planet's land.
数百万年来，自然之力是刻画着地球表面的主力。 For millions of years, natural forces have shaped Earth's surface.
如今，毋庸置疑，地貌受人类活动影响而改变， But now, it is undoubtedly us who will decide
未来，我们的家园会变成怎样？ what our home will look like in the future.
下集 Next time...
从太空俯瞰我们蓝色的星球 The view from space reveals our blue planet
看到地表，犹如万花筒变幻的不可思议的颜色。 as a kaleidoscope of incredible colours.
海洋中巨大的青绿漩涡 Vast turquoise swirls in the ocean
触发地球最大的盛宴。 trigger the planet's biggest feeding frenzy.
亿万花朵，将中国的土地，染成亮黄色。 Billions of flowers turn a Chinese landscape bright yellow.
东非的湖泊 And a lake in East Africa is transformed
被千万只火烈鸟，染成粉红 by the pink of thousands of flamingos.
每种颜色都有独特的秘密，需要我们一探究竟。 Each colour has its own remarkable secrets to reveal.
开放大学制作了一张从太空俯瞰地球的海报。 The Open University has produced a poster exploring Earth from space.
如需免费副本，打电话 To order your free copy, call...
或来信 ..or go to...
或电邮在线联系开放大学。 ..and follow the links to the Open University.