A Perfect Planet. 一个完美的星球.
There is a nuclear reactor 93 million miles away. 九千三百万英里外有一座核反应堆.
We call it the Sun. 我们称之为太阳.
Its rays,travelling through space, 它的光线穿越太空,
reach the Earth in just eight minutes 八分钟内到达地球
and give power to life throughout the planet. 给地球上的生命提供能量.
Its daily and yearly rhythms 每天和每年的节奏
shape the existence of every creature on Earth 塑造地球上每一种生物的存在
and has done so for over three billion years. 已经有30多亿年了.
In the beginning 一开始
there was light. 有灯光.
Surprisingly,perhaps,almost every part of the Earth's surface 令人惊讶的是,地球表面几乎每一部分
receives the same quantity of sunlight each year 每年接受相同数量的阳光
4,380 hours of it. 4380小时.
But it's delivered in varying amounts 但数量不一
at different times of the year, 在一年中的不同时间,
depending on where you are. 取决于你在哪里.
It's only here in the tropics,close to the equator, 只有在热带靠近赤道的地方,
that there are 12 hours of guaranteed daily sunlight 保证每天有12小时的日照
the year round. 一年四季.
And,here,that has created a great richness of life - 在这里,它创造了丰富多彩的生活-
the tropical forest. 热带森林.
Each leaf is a natural solar panel which collects the sun's energy 每片叶子都是一块收集太阳能量的天然太阳能板
and fuels a multitude of plants. 为许多植物提供燃料.
And,in Southeast Asia,gibbons live here. 在东南亚,长臂猿住在这里.
A five-year-old female 一个五岁的女人
and her lifelong partner are on a mission. 她的终身伴侣正在执行一项任务.
Every morning,they head out across their territory 每天早上,他们都会穿越自己的领地
to look for ripe fruit. 寻找成熟的水果.
There is one kind of tree here that they need more than any other. 这里有一种树,他们比其他树都需要.
The fig tree. 无花果树.
These are the only plants in the entire forest that produce fruit 这些是整个森林里唯一能结果实的植物
all year round. 一年四季.
Their flowers grow in dense clusters 他们的花丛生
inside undeveloped figs, 在未发育的无花果里面,
but these have not yet been pollinated 但这些还没有授粉
and are not yet edible. 还不能食用.
The gibbons will have to wait. 长臂猿们必须等待.
To produce ripe fruit,the fig still needs two things 要生产成熟的水果,无花果还需要两样东西
a large dose of sunlight 大剂量的阳光
and some of the smallest creatures in the forest. 还有一些森林里最小的生物.
Tiny fig wasps. 无花果小蜂.
They're only 2mm long. 它们只有2毫米长.
The figs have a unique partnership with these insects. 无花果与这些昆虫有着独特的伙伴关系.
A female wasp has the space of just a single day 一只雌黄蜂只有一天的空间
when the fig will allow her to burrow into the undeveloped fruit. 无花果会让她钻到未发育的果实里.
It's such a tight squeeze that her wings are ripped off. 挤得太紧了,她的翅膀都被扯下来了.
But she's not going to use them again. 但她不会再使用它们了.
Once inside,she makes her way to the tiny, 一进去,她就去了小旅馆,
tightly packed internal flowers. 内部花朵紧密排列.
And,here within,she lays hundreds of eggs. 在这里,她下了几百个蛋.
She then carefully unpacks fig pollen from her abdomen 然后她小心地从腹部取出无花果花粉
and with it fertilises the tiny flowers. 用它给小花施肥.
When she's finished laying, 当她躺下后,
she dies 她死了
inside the unripe fig 在未成熟的无花果里面
alongside her eggs. 在她的蛋旁边.
The sunlight now slowly ripens the figs 阳光使无花果慢慢成熟
and helps the young wasps inside to develop. 帮助里面的小蜂发育.
After just five weeks,the eggs start to hatch. 仅仅过了五个星期,卵就开始孵化了.
The first to emerge are the golden,wingless males. 首先出现的是金色的,没有翅膀的雄性.
Things now become stranger than fiction. 现在事情变得比小说更奇怪了.
These males start to mate with their unhatched sisters. 这些雄性开始与它们未孵化的姐妹交配.
To reach them,they use a telescopic penis 为了接近它们,它们使用伸缩的阴茎
that's twice their body length. 是他们身体长度的两倍.
While their now-pregnant sisters are beginning to hatch, 当她们怀孕的姐妹开始孵化的时候,
the males themselves burrow their way to the outside world. 雄性动物自己钻洞到外面的世界.
The brothers' final act is a chivalrous one. 兄弟俩的最后一幕是侠义.
They sacrifice themselves to marauding ants. 他们牺牲自己去掠夺蚂蚁.
They're serving as decoys 他们在充当诱饵
so their sisters can take to the skies. 这样她们的姐妹就能飞上天了.
The young females,loaded with pollen,live for just 48 hours, 年轻的雌性,充满花粉,只能活48小时,
in which time they must find another fig tree at just the right stage 在这个时候,他们必须找到另一棵无花果树在适当的阶段
into which they themselves can burrow,as their mothers did. 它们自己也能钻进去,就像它们的母亲一样.
With the sun's helping hand,the figs are now ready to eat. 在太阳的帮助下,无花果现在可以吃了.
The gibbons know all the fig trees in their territory. 长臂猿知道他们领土上所有的无花果树.
And each day they travel up to two miles 每天它们的行程可达两英里
to find one with fruit that's ready to eat. 找一个有水果可以吃的.
Ripe figs at last 终于成熟了
a major part of their diet and available the year round. 他们饮食的主要部分,一年四季都有.
Thousands of animals rely on fig trees. 成千上万的动物依赖无花果树.
This abundance is only possible in a world without seasons 只有在一个没有季节的世界里,这种丰富才有可能
and constant daily sunlight. 每天持续的阳光.
But this 12-hour cycle of light and darkness 但是这12个小时的光与暗的循环
only happens close to the equator. 只发生在赤道附近.
Elsewhere,the amount of sunlight fluctuates across the year. 在其他地方,日照量全年波动.
That is because the Earth does not spin in an upright way. 那是因为地球并不是以垂直的方式自转.
Its axis is on a tilt. 它的轴是倾斜的.
23.5 degrees. 23.5度.
So as the Earth makes its annual orbit around the Sun, 所以当地球每年绕太阳运行时,
keep your eye on the North Pole. 注意北极.
For the first half of the year,it's angled away from the Sun, 今年上半年,它远离太阳,
bringing darkness and winter to the northern hemisphere. 给北半球带来黑暗和冬天.
For the second part of the year, 今年下半年,
the North Pole swings towards the Sun,bringing summer. 北极向着太阳摆动,带来了夏天.
The Earth's tilt gives us the seasons. 地球的倾斜给了我们季节.
And life has adapted 生活已经适应了
to deal with even the most extreme changes in light. 即使是最极端的光照变化.
The High Arctic. 北极高地.
After six months of being angled towards the Sun, 经过六个月的斜着太阳,
it begins six months of freezing darkness. 它开始了六个月的寒冷黑暗.
This is Ellesmere Island, 这是埃尔斯米尔岛,
the closest land to the North Pole. 离北极最近的陆地.
It's winter,and for the last four,long months, 现在是冬天,在过去漫长的四个月里,
the only light here has come from the Moon. 这里唯一的光来自月球.
Few creatures can survive this sustained darkness. 很少有生物能在持续的黑暗中生存.
They have become specialists in living for months without sunlight. 他们成了在没有阳光的情况下生活数月的专家.
Muskox. 麝香.
Remnants of the last Ice Age. 最后一个冰河时代的遗迹.
Having grazed all summer,they've built up fat reserves 整个夏天都在吃草,它们已经积累了脂肪储备
that will enable them to survive the brutal cold of winter. 这将使他们能够在严冬中生存.
And this makes them a prime target for other sub-zero specialists. 这使得他们成为其他零下专家的主要目标.
Arctic wolves. 北极狼.
The Moon provides just enough light for them to see. 月球为他们提供了足够的光线.
This alpha female leads the hunt. 这只阿尔法雌鲸负责狩猎.
Target in sight. 瞄准目标.
If her pack is to survive,they need to make a large kill 如果她的团队要生存下去,他们就得大举杀戮
at least once every three weeks. 至少每三周一次.
The alpha female signals the start of the attack. 雌性阿尔法犬发出攻击开始的信号.
They run at the muskox and the herd panics. 他们向麝牛跑去,牛群惊慌失措.
The muskox close ranks. 麝香犬排得很近.
The wolves look for weakness. 狼群寻找弱点.
Charging risks isolation from the crowd. 充电有脱离人群的危险.
And that is just what the wolf pack wants. 这正是狼群想要的.
The wolves can sense victory. 狼能感觉到胜利.
But the herd comes to the rescue. 但牛群来拯救.
And,once again,they close ranks. 他们又一次团结一致.
Most winter hunts end in failure for the wolves. 大多数冬季狩猎都以失败告终.
As the long polar nights drag on, 在漫长的极地之夜,
the hungry wolves turn to their only other source of food 饥饿的狼转向他们唯一的食物来源
arctic hares. 北极野兔.
They've gathered together in their hundreds for safety. 为了安全起见,他们成百上千地聚集在一起.
Trying to catch one hare among hundreds 想在几百只兔子中抓一只
is harder than you might think. 比你想象的要难.
Even if they do catch one,it's not much of a meal. 即使他们真的抓到一只,也不算什么大餐.
Sometimes you just have to admit defeat. 有时候你不得不承认失败.
But life is about to get better for the wolves. 但是狼的生活即将变得更好.
For the first time in six months,the sun rises above the horizon. 六个月来,太阳第一次从地平线上升起.
Its appearance marks the beginning of half a year of continuous light. 它的出现标志着连续半年的光照开始了.
The sun's warmth will allow the muskox to give birth, 太阳的温暖会让麝牛生下来,
and that will provide easier hunting for the wolves. 这样就更容易猎杀狼了.
It's early spring, 现在是早春,
and much of North America is still locked in ice. 北美大部分地区仍被冰封.
As our tilted planet orbits the Sun, 当我们倾斜的行星绕太阳运行时,
the northern hemisphere receives increasing sunlight 北半球接收到越来越多的阳光
and wakens an animal with an almost supernatural ability. 唤醒一个有着超自然能力的动物.
It is frozen solid, 它是冰冻的固体,
like a block of ice, 就像一块冰,
and has been all winter. 整个冬天都在.
An ordinary-looking frog 一只长相普通的青蛙
but an extraordinary one. 但这是一个非同寻常的时刻.
A wood frog. 一只林蛙.
Its heart has stopped beating completely. 它的心脏完全停止了跳动.
But,as the sun's power increases, 但是,随着太阳能量的增加,
almost miraculously,it begins to change. 几乎奇迹般地,它开始改变.
Its frozen blood is melting 它冻结的血液正在融化
and begins to flow through its veins 开始流过它的血管
as its heart begins to beat again. 当它的心脏再次开始跳动.
The wood frog is cryogenic. 木蛙是低温的.
In just 12 hours, 在12小时内,
it thaws and comes back to life,as if by magic. 它融化了,又复活了,就像变魔术一样.
This defrosting ability 这种除霜能力
means it's ready for the moment when,at last, 意味着它终于准备好了,
spring arrives. 春天来了.
All across the northern hemisphere, 整个北半球,
the sun's warmth is bringing dramatic change. 太阳的温暖正在带来巨大的变化.
As the sun rises higher and spring takes hold, 当太阳升得更高,春天来临,
the warming air reaches the ground and the rocks beneath. 暖空气到达地面和下面的岩石.
Here,thousands of animals begin to stir. 在这里,成千上万的动物开始蠢蠢欲动.
Garter snakes, 吊袜带蛇,
one of Canada's most northerly reptiles. 加拿大最北的爬行动物之一.
After six months of hibernation, 经过六个月的冬眠,
the males are the first to emerge. 雄性是第一个出现的.
They haven't eaten for months. 他们好几个月没吃东西了.
Even so,it's not food that is on their minds,it's something else 即便如此,他们心里想的不是食物,而是别的东西
females. 女性.
But they stand no chance of doing anything about that 但他们不可能对此采取任何行动
until they've charged their batteries. 直到他们给电池充电.
Snakes are cold-blooded and they need to absorb the sun's heat 蛇是冷血动物,它们需要吸收太阳的热量
before they're able to move quickly. 在他们快速行动之前.
After a few hours,the males are raring to go. 过了几个小时,雄鸟们就迫不及待地要走了.
20,000 snakes, 20000条蛇,
the largest emergence of reptiles 爬行动物的最大规模出现
anywhere on Earth. 地球上任何地方.
Now a few females appear. 现在出现了一些雌性.
They're much bigger than the males 它们比雄性大得多
and warming will take them longer. 气候变暖会让它们花更长的时间.
She releases a scent,a pheromone, 她释放出一种气味,一种信息素,
that attracts the males. 吸引雄性.
They outnumber her 100 to one. 他们的人数比她多100:1.
To speed her own return to activity,she will absorb heat from them. 为了加速她自己的恢复活动,她会从中吸收热量.
Intoxicated by her scent,the males compete for her, 被她的气味陶醉,雄性为她竞争,
wrapping themselves around her. 把自己裹在她身上.
She now has hundreds of males on top of her, 她身上现在有几百只雄性,
making mating near impossible. 使交配几乎不可能.
But she has a way of weeding out the men from the boys. 但她有办法把男人从男孩中剔除.
She'll make a daring ascent of the nearby cliff. 她将勇敢地爬上附近的悬崖.
She barges her way through the crowd to get to the rock face. 她从人群中艰难地走到岩石表面.
As she climbs,only the strongest,fittest males can keep up with her. 当她攀爬时,只有最强壮、最健康的雄性才能跟上她.
She's made it to the top. 她成功登顶了.
Only a few of her suitors have managed to rise to the occasion, 她的求婚者中只有少数人能应付自如,
and she may reward them all. 她可以奖励他们所有人.
This entire mating jamboree only lasts 整个交配狂欢只会持续
for one short week in the year. 一年中短短的一周.
And when it's over,they all move off into the forest. 当一切结束后,他们都搬进了森林.
There,they disperse to lead solitary lives searching for food 在那里,他们分散开来,过着寻找食物的孤独生活
until winter drives them back to the shelter of the rocks below ground. 直到冬天把它们赶回地下岩石的庇护所.
It's June,halfway through the Earth's annual journey 现在是六月,地球一年一度的旅程已经过半
around the sun,and summer has arrived in the northern hemisphere. 围绕着太阳,夏天已经来到了北半球.
Karak Lake,in Canada,north of the Arctic Circle. 卡拉克湖,位于加拿大北极圈以北.
The summer will be brief, 夏天很短暂,
but there is sunlight for 24 hours every day. 但是每天有24小时的阳光.
So the next few months are vital for every living thing here. 所以接下来的几个月对这里的每一个生物都至关重要.
And this arctic fox knows it. 这只北极狐知道.
Winter has been hard for her,and now with a new family to support, 冬天对她来说很艰难,现在有了一个新的家庭要养活,
she must make the most of the summer's abundance. 她必须充分利用夏天的丰盛.
Her three-week-old pups have just emerged from the den. 她三周大的小狗刚从巢穴里出来.
Each of these little bundles of fur 每一小捆毛皮
needs nearly 300 calories of food every day. 每天需要将近300卡路里的食物.
A tall order for Mum. 对妈妈的要求很高.
But a solution for her problem is just arriving. 但解决她的问题的办法刚刚到来.
Snow geese. 雪雁.
They have flown over a thousand miles from the United States, 他们从美国飞了一千多英里,
timing their arrival to coincide with the end of the snow. 他们到达的时间正好赶上雪的结束.
More than half a million will spend the summer here, 50多万人将在这里度过夏天,
nesting and feeding on the grass. 在草地上筑巢和觅食.
There's fierce competition between couples 夫妻之间竞争激烈
for the safest nesting sites. 为了最安全的筑巢地点.
The losers will have to nest on the outskirts of the colony 失败者将不得不在殖民地外围筑巢
the first part to be raided by the foxes. 第一部分被狐狸袭击.
Mother is after eggs 妈妈在找鸡蛋
but getting them is not going to be easy. 但是得到它们并不容易.
The geese will risk their lives to protect their eggs. 鹅会冒着生命危险去保护它们的蛋.
If they lose them,they can't produce another clutch this season. 如果他们失去了他们,他们就不能在这个赛季再生产一个离合器.
The fox wins. 狐狸赢了.
She gives the first eggs to her young pups 她把第一个蛋给她的幼崽
and then heads back for more. 然后回去找更多的.
Some of the eggs she stashes away. 她藏起来的一些鸡蛋.
They will be food to help her through the coming winter. 它们将成为帮助她度过即将到来的冬天的食物.
In just three weeks,she will steal over 800 eggs from the geese. 在短短的三周内,她将从鹅身上偷走800多个鸡蛋.
But eating a big egg is not easy 但是吃一个大鸡蛋并不容易
if one is rather small. 如果一个相当小.
It's a technique the pups haven't quite yet cracked. 这是一种小狗还没有完全掌握的技术.
Mum shows how it's done. 妈妈展示了它是怎么做的.
Goslings are now hatching all across the colony. 小鹅正在整个殖民地孵化.
And they will need all the food they can get 他们需要所有能得到的食物
to build up their fat before their journey south. 在他们南下之前把脂肪堆积起来.
Now that the chicks have hatched, 小鸡已经孵出了,
they can all find safety on the water. 他们都能在水上找到安全的地方.
In these brief sunlit months,there's time for the cubs to play. 在这短暂的阳光普照的月份里,幼崽们有时间玩耍.
But there is no playtime for Mum. 但是妈妈没有时间玩.
But the Arctic is warming, 但是北极正在变暖,
and the timing of the seasons and the migration of the geese 以及季节和鹅迁徙的时间
is becoming unpredictable. 变得不可预测.
Although the sun stays above the horizon continuously 尽管太阳一直在地平线上
throughout the Arctic summer, 整个北极夏季,
its rays are comparatively feeble. 它的光线相对较弱.
Closer to the equator,in our planet's deserts, 靠近赤道,在我们星球的沙漠里,
cloud cover is rare. 云层很少.
The sun here is not a friend 这里的太阳不是朋友
but an enemy. 而是一个敌人.
Africa. 非洲.
The Sahara. 撒哈拉沙漠.
Few creatures can live here. 很少有生物能在这里生存.
Get caught out in the open at the wrong time of day 在一天中错误的时间暴露在外面
and it's game over. 游戏结束了.
By 10:00 in the morning,the temperature on the surface 到早上10点,地表温度
of the sand is pushing 60 degrees Celsius. 沙子的温度上升了60摄氏度.
Even the toughest will soon have to take cover. 即使是最强悍的人也很快得躲起来.
But one creature is waiting underground 但有一种生物在地下等待
for the sun to get even hotter. 让太阳变得更热.
Temperatures are now so high 现在气温很高
that everything else has to shelter. 其他的东西都得躲起来.
The desert now belongs to the Earth's greatest solar specialist 沙漠现在属于地球上最伟大的太阳专家
the Saharan silver ant. 撒哈拉银蚁.
At midday,when the sun is at its fiercest, 正午,太阳最猛烈的时候,
they emerge to look for creatures killed by the scorching heat. 他们出来寻找被灼热杀死的生物.
They're one of the fastest insects on Earth,and they need to be, 它们是地球上最快的昆虫之一,
with just five minutes to find food before the heat kills them. 只需5分钟就可以找到食物,然后热就把它们烧死了.
Getting lost would mean certain death, 迷路意味着死亡,
so every few seconds they spin round, 所以每隔几秒钟他们就会转一圈,
taking a bearing from the sun. 从太阳那里获取方位.
When others are frying,these ants have solar tech 当其他人在煎炸时,这些蚂蚁拥有太阳能技术
to stop them from overheating 防止过热
special glassy hairs and shining bodies 特殊的玻璃状毛发和闪亮的身体
that reflect the sun's lethal rays. 反射太阳的致命射线.
It buys them precious time. 这为他们赢得了宝贵的时间.
To get their prize back as quickly as possible 尽快拿回他们的奖品
to their underground den demands teamwork. 去他们的地下巢穴需要团队合作.
But shelter is a long way away. 但是庇护所还有很长的路要走.
Any technique will do. 任何技术都可以.
The push and slide. 推和滑.
The spin. 旋转.
Even dune surfing. 甚至沙丘冲浪.
The nest is still 70 metres away. 鸟巢还有70米远.
Some are already collapsing in the heat. 有些已经在高温中崩溃了.
Reinforcements are needed urgently. 急需增援.
Now the heat whips up violent gusts of hot desert air. 现在,炎热的天气掀起了一阵猛烈的沙漠热空气.
For an ant,these are hurricanes. 对于蚂蚁来说,这是飓风.
They must get their prize underground as soon as possible, 他们必须尽快把奖品藏到地下,
and blown sand has blocked the entrance to their den. 风沙堵住了他们巢穴的入口.
Any longer out here and they will be toast. 再在这里,他们就要被烤了.
One final effort. 最后一次努力.
The last of the team race home. 全队最后一名选手比赛回家.
Shade,at last. 阴影,终于来了.
Much of the land on our planet could become as scorched 我们星球上的大部分土地都可能被烧焦
and lifeless as this if we allow our activities 如果我们允许我们的活动
to continue to change the atmosphere. 继续改变气氛.
The Sahara alone has expanded by an area twice the size of France 仅撒哈拉沙漠的面积就扩大了一倍于法国的面积
in just the last hundred years 在过去的一百年里
part of a global desert invasion that threatens a third of all land. 威胁到三分之一土地的全球沙漠入侵的一部分.
The sun can certainly be a lethal threat, 太阳肯定是致命的威胁,
but it could also be our saviour. 但它也可能是我们的救星.
The solar energy that strikes our planet in just an hour 一小时内撞击地球的太阳能
contains more power than that used by all of humanity 包含比全人类所使用的更多的力量
in an entire year. 整整一年.
By October,as the Earth completes its annual journey 到了十月,地球完成了它每年的旅程
around the sun,day lengths in the northern hemisphere 在太阳周围,北半球白天的长度
are shortening once again. 又开始变短了.
The sun's power is diminishing. 太阳的能量正在减弱.
Trees are beginning to shut down their solar panels. 树木开始关闭太阳能电池板.
The green chlorophyll with which they collected the sun's energy 用来收集太阳能量的绿色叶绿素
is broken down chemically and reabsorbed. 被化学分解并被重新吸收.
And the forests turn from emerald to gold. 森林从绿宝石变成了金子.
It's autumn. 现在是秋天.
Once again,the living world away from the tropics is transformed. 远离热带的生活世界再一次发生了变化.
Plants stop growing 植物停止生长
and many animals begin to prepare for tough times ahead. 许多动物开始为未来的艰难时刻做好准备.
The forests of central China 华中森林
home to the golden snub-nosed monkey. 金丝猴的家.
They will not survive the fast-approaching winter 他们无法在即将到来的严冬中生存
unless they stock up on calorie-rich food. 除非他们囤积高热量的食物.
Top of their autumn menu - pine cones, 他们的秋季菜单之首-松果,
They grew during the summer sunlight and are rich in fats. 它们在夏季阳光下生长,富含脂肪.
Few are now left, 现在所剩无几,
and time to gather them is running out. 收集它们的时间已经不多了.
Dominant males patrol the troop, 占统治地位的男性在巡逻,
making sure they get the pick of the crop. 确保他们能摘到庄稼.
As the number of pine cones dwindles, 随着松果的减少,
tensions between rival families increase. 敌对家庭之间的紧张关系加剧.
Mere threats between two males may not be enough to settle disputes. 仅仅两个男性之间的威胁可能不足以解决争端.
Conflict is in the air. 空气中弥漫着冲突.
There's going to be a fight. 要打架了.
Vital food is at stake, 重要的食物岌岌可危,
so every pine cone is worth fighting for. 所以每一个松果都值得为之奋斗.
The victor and his family enjoy the spoils of war. 胜利者和他的家人享受战利品.
The losers get no more than a few dead leaves 失败者只得到几片枯叶
and will have fewer energy reserves for the coming winter. 为即将到来的冬天储备的能源也将减少.
The sun's power dims. 太阳的能量变暗了.
Temperatures drop. 气温下降.
Everything slows down. 一切都变慢了.
Ahead lies months of crippling cold. 前方是数月的严寒.
Most of the life on Earth away from the tropics 地球上的大部分生命都远离热带
has managed to adapt to the changing seasons, 已经适应了季节的变化,
but there are some creatures that have found a way 但是有些生物已经找到了办法
to avoid the cold of winter altogether. 为了避免冬天的寒冷.
Snares Island,New Zealand, 新西兰斯奈尔斯岛,
deep in the southern hemisphere. 在南半球深处.
Here,sooty shearwaters have been nesting throughout the long summer 整个漫长的夏天,乌黑的雪水一直在这里筑巢
and gorging themselves on fish. 狼吞虎咽地吃鱼.
As a result,they've piled on quite a few pounds. 结果,他们的体重增加了不少.
But the sun is now fading,and the southern winter is approaching. 但是现在太阳已经渐渐暗淡了,南方的冬天也快到了.
No time to hang around. 没时间闲逛了.
When you're a touch tubby, 当你是个小胖子的时候,
launching into the air 向空中发射
is a leap of faith. 是信仰的飞跃.
They won't see land again for four weeks. 他们四个星期内不会再看到陆地了.
Setting off across the Pacific,they're starting on 从太平洋那边出发,他们开始
one of the longest journeys made by any living thing. 生命中最长的旅程之一.
Their aim - to avoid the consequences of the Earth's tilt 他们的目标是避免地球倾斜的后果
and follow the sun's warmth as it dwindles in the south 跟随太阳的温暖,因为它在南方逐渐减弱
and increases in the north. 在北方增加.
For those who survive the 10,000-mile marathon, 对于那些在10000英里马拉松中幸存下来的人,
there will be a great prize. 将会有一个巨大的奖品.
The reward for travelling from one end of the planet to the other 从地球的一端到另一端旅行的报酬
is long summer days the year round. 一年四季都是漫长的夏日.
This is their destination 这是他们的目的地
Alaska's Aleutian Islands. 阿拉斯加的阿留申群岛.
While the south of our planet is slipping into autumn 当我们星球的南部进入秋天的时候
here,summer is just beginning. 在这里,夏天才刚刚开始.
Below the waves,vast clouds of plankton are blooming. 在海浪的下面,大片的浮游生物正在繁衍生息.
Triggered by the sunlight, 由阳光触发,
these tiny marine organisms 这些微小的海洋生物
are food for crustaceans - krill. 是甲壳类动物的食物-磷虾.
This is the sun-fuelled bounty 这是太阳推动的赏金
for which the shearwaters have crossed the planet. 为此,希尔沃特斯穿越了地球.
By cheating the tilt, 通过欺骗倾斜,
they're able to enjoy the riches of summer the year round. 他们终年都能享受夏天的丰盛.
But shearwaters are not the only ones to visit the warming seas. 但是,希尔沃特斯并不是唯一一个访问变暖的海洋.
Humpback whales. 座头鲸.
They've been breeding in the tropics 它们一直在热带繁殖
and haven't fed for six months. 六个月没吃东西了.
Up to 6,000 whales are now heading for these islands - 目前有多达6000头鲸鱼正前往这些岛屿-
the only place where they can find food in the quantities they need. 他们唯一能找到所需数量食物的地方.
The shearwaters begin to dive into a huge shoal of krill. 剪切水开始潜入一个巨大的磷虾浅滩.
The humpbacks attack from below. 座头鲸从下面攻击.
Each year,a million shearwaters join the whales 每年,有100万头大白鲸加入鲸鱼的行列
in these dramatic feeding frenzies. 在这些戏剧性的喂食狂潮中.
It's one of the greatest gatherings of life on Earth. 这是地球上最伟大的生命聚会之一.
And it only happens because some whales and some birds 只因为有些鲸鱼和鸟
have found a way to live in a summer that never ends. 找到了一种方式,在一个永远不会结束的夏天生活.
Rolf Steinmann has wanted to be a wildlife cameraman 罗尔夫斯坦曼想成为一名野生动物摄影师
since he was a child,even if he has to remind himself from time to time. 因为他是个孩子,即使他不得不不时提醒自己.
I'm a lucky cameraman. 我是个幸运的摄影师.
I'm a lucky cameraman 我是个幸运的摄影师
To those who've worked with Rolf,his love of the wild is legendary. 对那些与罗尔夫共事过的人来说,他对野外的热爱是传奇.
You know,if he's not on location,he's at home watching 你知道,如果他不在现场,他就在家里看着
every other wildlife documentary that's ever been made. 所有其他野生动物纪录片.
I think Rolf is motivated by the beauty in the world. 我认为罗尔夫的动机是世界的美丽.
I think he really has this pure heart. 我想他真的有一颗纯洁的心.
Rolf alone with nature is Rolf at his best. 罗尔夫独自与大自然相处是他最好的状态.
Rolf is a man obsessed. 罗尔夫是个痴迷的人.
The opportunity to be the first to film arctic wolves 第一个拍摄北极狼的机会
in the polar night is Rolf's dream of a lifetime. 在极地之夜是罗尔夫一生的梦想.
We have a lot of luggage.This is a major expedition. 我们有很多行李.这是一次重要的探险.
And there's one piece of luggage that is very, 还有一件行李,
very special to me,and it's 对我来说很特别
It's actually this book by Jim Brandenburg. 实际上是吉姆·勃兰登堡的这本书.
It's 30 years old,it's from the '80s. 30岁了,是80年代的.
And when I saw this book the first time, 当我第一次看到这本书的时候,
it really triggered a dream to become a wildlife cameraman. 它真的引发了一个梦想,成为一名野生动物摄影师.
And this was the shot. 这就是枪声.
It's unmatched to this day. 今天是无与伦比的.
When I saw it,I just wanted to experience it myself. 当我看到它的时候,我只是想亲自体验一下.
To go to Ellesmere now and to film wolves is 现在去埃尔斯米尔拍摄狼群
is my biggest dream coming true. 我最大的梦想就要实现了.
If I'm honest,I'm not just excited about the shoot, 老实说,我不只是对拍摄感到兴奋,
I'm also a little bit anxious. 我也有点焦虑.
I haven't worked in -50 degrees, 我已经50度没工作了,
and actually trying to find wolves in darkness,in the polar night, 在极夜,在黑暗中寻找狼,
is something that has not even been tried by anyone. 甚至没有人尝试过.
Ellesmere Island lies just 500 miles from the North Pole. 埃尔斯米尔岛距离北极只有500英里.
In the winter,the sun doesn't rise for four months. 冬天,太阳有四个月不升起.
The temperature regularly drops to -50 degrees 气温有规律地降到零下50度
making it one of the coldest places on Earth. 使它成为地球上最冷的地方之一.
It's such an unreal place. 真是个不真实的地方.
It's like a like a frozen dream. 就像一个冰冻的梦.
There's so much space. 空间太大了.
It's really like a different planet. 它真的像一个不同的星球.
The wolves here can range for thousands of miles 这里的狼可以活动数千英里
across the frozen landscape. 穿过冰冻的风景.
If you look at that landscape, 如果你看看那风景,
how vast it is, 它有多大,
you can imagine how hard it is to find the wolves, 你可以想象找到狼有多难,
a white animal in a white landscape. 白色风景中的白色动物.
One wolf has a radio collar, 一只狼有无线电项圈,
but this kind of telemetry only gives a rough direction to explore. 但这种遥测技术只能给出一个粗略的探索方向.
The fjord is just to the south,so I think the best plan 峡湾就在南边,所以我认为最好的计划
is cut across on the ice and see if we can find a way up. 在冰上划过,看看能不能找到上升的路.
The team race towards the wolf's last broadcast position 队伍朝着狼的最后一个广播位置跑去
and get lucky. 祝你好运.
They find the whole pack, 他们找到了整群人,
and something never seen before. 一些从未见过的东西.
This is so incredible. 太不可思议了.
A herd of hundreds of arctic hares 几百只北极野兔
are under attack from Rolf's white wolves. 受到罗尔夫的白狼的攻击.
Wow. 真 的.
We found our 我们找到了
our pack of seven wolves, 我们的七匹狼,
in their full beauty,which is amazing. 在他们的全部美丽,这是惊人的.
Filming the new behaviour ramps up the pressure on Rolf. 拍摄这一新行为加大了罗尔夫的压力.
Oh,God,the situation is just right in the wrong spot. 哦,天哪,情况正好在错误的地方.
Rolf is well known for his self-criticism. 罗尔夫以自我批评著称.
He's a perfectionist. 他是个完美主义者.
You know,he wants that image to be absolutely perfect. 你知道,他希望那张照片绝对完美.
You're amazing,but I'm stupid,unfortunately. 你很了不起,但不幸的是,我很愚蠢.
A day later,the wolves disappear out of range of the telemetry. 一天后,狼群消失在遥测范围之外.
It said they were here,but now they aren't here 上面说他们在这里,但现在不在了
and we don't get any signal from the telemetry. 我们没有收到任何遥测信号.
So,now I think we realise how hard it will be to find the wolves 所以,现在我想我们意识到要找到狼有多难了
if we don't just run into them. 如果我们不只是碰到他们.
With no wolves to film,Rolf is determined 由于没有狼可拍,罗尔夫下定决心
to capture the beauty of the landscape with a drone. 用无人机捕捉美景.
We just can't get the thing in the air. 我们就是不能让它飞起来.
Um,the motors,they've physically frozen solid. 嗯,马达,它们已经凝固成固体了.
And the drone's not the only thing that's freezing. 而且无人机不是唯一一个冻坏的东西.
Look what I just found under my mask. 看看我在面具下发现了什么.
A plan to warm up the drone with a hairdryer and a duffel bag 一个用吹风机和行李袋来暖机的计划
could mean that the world record for the coldest flight is still on. 可能意味着最冷飞行的世界纪录还在继续.
Success! 成功！
But the cold soon takes its toll on Jesse,the drone operator. 但是寒冷很快就给无人机操作员杰西带来了损失.
Argh! I'm sorry,I can't feel my hands. 啊！对不起,我感觉不到我的手.
I think we have to drift to the right a little bit more. 我想我们得再往右转一点.
When you're on a shoot with Rolf,he'll just keep going 当你和罗尔夫一起拍的时候,他会一直拍下去
and going and going. 走啊走啊走.
We can fly towards the big mountain. 我们可以飞向那座大山.
I can get the Argh! the big mountain,you know 我可以得到阿格！大山,你知道吗
Yeah.like,more centred. 是 啊.就像,更集中.
Argh! My hands! 啊！我的手！
Come on,it's coming,it's coming.You just fly straight,Jesse. 来吧,来了,来了.你就直飞吧,杰西.
But I'm losing my sensation in my hands,Rolf. 但我的手已经失去知觉了,罗尔夫.
Yeah,let's hit roll on it before we die Let's record. 是的,在我们死之前,让我们开始吧,让我们录下来.
Come on,do it. 来吧,做吧.
This feels like a totally different planet.It's really crazy. 这感觉完全不同行星.它真是疯了.
OK,and I think now we could do a forward view.Yeah. 好吧,我想现在我们可以做一个前锋了风景.是的.
Argh! Perfect,Jesse.You can go a bit slower. 啊！太好了,杰西.你可以慢一点.
If you can,go a bit slower.My fingers are hurting. 如果可以的话,再慢一点.我的手指疼.
Argh! 啊！
That looks really cool! 看起来真的很酷！
It's incredible. 太不可思议了.
With no sighting of the wolves in weeks, 好几个星期没看到狼了,
the team decide to follow their prey instead. 小组决定跟着猎物.
Muskoxen. 麝牛.
And the tactic pays off. 这种策略是有回报的.
The herd is being shadowed by the wolves. 群狼在跟踪羊群.
They are very close to a herd of muskoxen there, 他们离那群麝牛很近,
and something might happen. 可能会发生什么事.
Rolf is in the perfect spot to capture the first arctic wolf hunt 罗尔夫是捕捉第一次北极狼捕猎的最佳地点
ever filmed in the polar night. 曾经在极地之夜拍摄过.
God,there was some good stuff,I think,if I got it in focus. 天哪,如果我能集中注意力的话,我想有些好东西.
With the shots in the can,there is a magical experience for Rolf 在罐子里开枪,对罗尔夫来说是一种神奇的经历
one he's dreamed of since he was a child. 一个他从小就梦想的.
It doesn't get better than this. 再好不过了.
Oh,my God.This is an absolutely 哦,天哪天啊.这个是绝对的
dream of a lifetime. 一生的梦想.
Honestly,you are the most beautiful living being I've ever seen. 老实说,你是我见过的最美丽的生物.
Incredible. 简直 不可思议.
Next time 下次
weather. 天气.
This powerful force carries vital freshwater around the globe. 这种强大的力量将重要的淡水带到全球各地.
And all life on land is perfectly in tune with its annual rhythms. 陆地上的所有生命都与它的年节律完美地协调一致.
The Open University has produced a free poster 开放大学制作了一张免费海报
exploring our perfect planet. 探索我们完美的星球.
To order,please call 0300 303 0901. 如需订购,请致电0300 303 0901.
Or go to bbc.co.uk/perfectplanet 或者去bbc.co.uk/perfectplanet
and follow the links to the Open University. 并按照链接到开放大学.