Earth is a restless place. 地球是一个动荡不安的地方.
Its seasons driven by the orbit around our sun. 季节变化是由围绕太阳的公转决定的.
An epic journey that sets the rhythms of all life. 一段史诗般的旅程决定了所有生命的节奏.
Humans honour this passage through ritual and celebration. 人类通过仪式和庆祝来纪念这一时刻.
Nature marks the cycle with its own patterns. 大自然用自己的模式来记录这一循环.
Over the course of a year, 在一年的时间里,
the planet's most spectacular events of migration, 地球上最壮观的迁徙行动,
rebirth and transformation unfold. 开始了重生与蜕变.
Moment by moment, 每时每刻,
month by month, 月复一月,
throughout a wild year on Earth. 在地球上狂野的一年里.
狂 野 地 球
十一月 – 十二月
轮回
It's November,and the Earth has almost completed 现在是11月,地球几乎完成了
its annual orbit around the sun. 它每年围绕太阳运行.
As the planet comes full circle, 当行星转了一圈,
many of the life stories on earth. 地球上的许多生命故事.
also reach their climax. 也达到了高潮.
In the lush forests of Michoacan,Central Mexico, 在墨西哥中部米却肯茂密的森林里,
one of the greatest migrations on the planet. 地球上最伟大的迁徙之一.
is coming to an end. 即将结束.
A delicate creature has flown almost 3,000 miles 一个精巧的生物已经飞行了近3000英里
to spend the winter here,in the warmer southern lands. 在这里过冬,在温暖的南方土地上.
By the time the monarch butterflies reach Mexico, 当帝王蝶抵达墨西哥时,
millions of them have converged at their ancestral home. 数百万人聚集在他们的祖籍地.
No one butterfly makes the entire migration. 没有一只蝴蝶完成整个迁徙.
Rather,it's an intergenerational journey 相反,这是一次代际旅行
that was started by their great-great-grandparent 那是由他们的曾祖父母开始的
the previous spring. 前一个春天.
Using just an internal biological clock, 只用一个生物钟,
and the position of the sun, 太阳的位置,
they've managed to make it to a place 他们设法到了一个地方
they've never been before. 他们从来没有去过.
They'll overwinter here for the next four months, 接下来的四个月他们会在这里过冬,
huddled together to keep warm, 挤在一起取暖,
occasionally stretching their wings. 偶尔伸展翅膀.
These last sacred groves of fir trees 这些最后神圣的冷杉树林
provide refuge for the fragile, 为脆弱的人提供庇护,
fluttering icon in a rapidly changing world. 在瞬息万变的世界里飘扬的偶像.
For centuries,Purepecha Indians 几个世纪以来,Purepecha印第安人
have recorded the arrival of the long,flowing cloud 记录下了长长的流云的到来
of orange-winged butterflies 橙色翅膀的蝴蝶
at precisely the same time each year. 每年的同一时间.
The butterflies are believed to be 蝴蝶被认为是
the souls of departed ancestors, 逝去祖先的灵魂,
returning to Earth for their annual visit. 返回地球进行年度访问.
Their arrival coincides with Dia de los Muertos, 他们的到来恰逢迪亚·德洛斯穆尔托斯,
'The Day of the Dead.' “死亡之日.”
It's a festival as colorful as the monarch. 这是一个和君主一样丰富多彩的节日.
On this night,millions of Mexicans will light candles 在这个夜晚,数百万墨西哥人将点燃蜡烛
to help guide the spirits of loved ones back home. 帮助引导亲人的灵魂回家.
Many Mexicans do not believe death is an ending. 许多墨西哥人不相信死亡是一个结局.
Rather,they embrace it as a part of a natural cycle. 相反,他们将其视为自然循环的一部分.
Through its metamorphosis 通过它的蜕变
from caterpillar to ethereal winged creature, 从毛毛虫到空灵的有翼生物,
the monarch represents resurrection. 君主代表复活.
Life after death. 死后的生活.
Across cultures, 跨文化,
many creatures have been regarded as spirits of the dead. 许多生物被认为是死者的灵魂.
In Madagascar,there are also ghosts in the forest. 在马达加斯加,森林里也有鬼魂.
The name 'lemur' is derived from a Latin word “狐猴”这个名字来源于一个拉丁词
referring to the spirits of people left unburied 指未埋葬的人的灵魂
who return by night from the dead to haunt the living. 他们夜间从死里归来,作祟活人.
Perhaps an unfair comparison,for such an appealing creature. 对于这样一个吸引人的生物来说,这也许是一个不公平的比较.
November is baby boom time for lemur parents. 11月是狐猴父母的婴儿潮时期.
Babies share a tight bond with their families. 婴儿与家人关系密切.
The troupe stick together,for there is safety in numbers. 剧团团结在一起,因为人数安全.
In the distance,dinner calls. 远处,晚餐在召唤.
Cicadas are the world's noisiest insect. 蝉是世界上最吵的昆虫.
They may be easy to hear,but they are not so easily caught. 他们可能很容易听到,但他们不那么容易被抓住.
As they take to the wing, 当它们飞到机翼上时,
the insects pee honey dew in the face of their pursuer. 昆虫在追赶者面前撒尿蜜露.
Craving the crunch of a cicada, 渴望着蝉的吱吱声,
the primates are undeterred. 灵长类动物没有被吓倒.
While the adults are engrossed with feasting, 当大人们聚精会神地吃大餐的时候,
the young one has wandered off. 那个年轻人走了.
It's a dangerous thing to do. 这是一件危险的事.
Predators not only soar.They also slither. 掠食者不仅会飞翔.它们也在滑动.
A boa constrictor like this 像这样的蟒蛇
would make an easy meal of the youngster. 会让这个年轻人吃上一顿轻松的饭.
Alone,the baby lemur instinctually cries out. 一个人的时候,小狐猴本能地大叫.
Luckily,Mum hears his call over the cicada cacophony. 幸运的是,妈妈在蝉鸣声中听到了他的呼唤.
He's safe once again. 他又安全了.
And after a bit of comfort grooming, 经过一番舒适的打扮之后,
the lemur troupe are back on the move. 狐猴剧团又开始行动了.
Lemur babies have been born to benefit from the flush of food 狐猴宝宝出生就是为了从食物中受益
that comes with the wet season. 这是雨季带来的.
Across the Mozambique Channel on the continent of Africa, 穿越非洲大陆的莫桑比克海峡,
the rains are yet to reach land-locked Zambia. 降雨还没有到达内陆的赞比亚.
It's been dry for seven straight months. 已经连续七个月没水了.
What little water remains becomes a beacon 剩下的一点点水就成了灯塔
to those searching for sustenance. 给那些寻找食物的人.
Quelea are the most numerous bird on the planet. 雀鸟是地球上数量最多的鸟.
Dubbed 'the locust bird' a super-flock like this 被称为“蝗虫鸟”这样的超级鸟群
can number 30 million at a time. 一次可以达到3000万.
Constantly on the move as they migrate across the continent, 它们在大陆上不断迁徙,
these waterholes 这些水坑
provide a vital place for them to quench their thirst. 为他们解渴提供一个重要的地方.
But it's not without its dangers. 但也不是没有危险.
Crocodiles lie in ambush. 鳄鱼埋伏.
But they're not an easy catch. 但他们不是一个容易抓到的.
The quelea may be birds,but they're no bird-brains. 雀鸟可能是鸟,但它们不是鸟脑.
They exhibit a super intelligence, 他们表现出超高的智商,
emerging from flock behavior. 从群体行为中脱颖而出.
No single individual is in charge. 没有一个人负责.
Rather,the flock is governed by simple rules, 相反,羊群受简单规则的支配,
mimicking their neighbors' movement 模仿邻居的动作
and maintaining equal distance. 保持相等的距离.
The flock becomes more than the sum of its parts. 羊群变得比它各部分的总和还多.
They take on the characteristics of a super-organism 它们具有超级有机体的特征
millions of birds acting as one. 数百万只鸟合二为一.
As Zambia's dry season comes to an end, 随着赞比亚旱季的结束,
these living clouds are replaced by darker ones on the horizon. 这些活云被地平线上较暗的云所取代.
It's a sign for them to move on 这是他们继续前进的标志
and return to the start of their migration, 回到他们迁徙的起点,
before the wet season truly begins. 在雨季真正开始之前.
In a matter of days, 几天之内,
rainfall completely alters the landscape. 降雨完全改变了景观.
Each valley becomes a lush green paradise. 每一个山谷都成为一个郁郁葱葱的绿色天堂.
The Emerald season has arrived. 翡翠的季节到了.
The new season brings with it new enterprise. 新的季节带来了新的事业.
Above the safety of a river, 在安全的河流之上,
master architects carry out some impressive aerial engineering. 大师级建筑师进行了一些令人印象深刻的空中工程.
Male weaver birds 雄性织布鸟
rely on the abundance of fresh,soft grass to build new nests. 依靠丰富的新鲜、柔软的草筑巢.
The tree is filled with males busy building, 树上满是忙碌的雄性建筑,
hoping their bachelor pad will be the one 希望他们的单身公寓
that attracts a female's attention. 吸引女性的注意力.
Nest-weaving is a skill that takes time to master. 编织巢是一项需要时间才能掌握的技能.
Each builder does a bit better than he did the year before. 每个建设者都比前一年做得好一点.
Yet some are clearly novices. 但有些人显然是新手.
If a neighbor's house is looking a little too good, 如果邻居的房子看起来有点太好了,
it may attract the wrong kind of attention. 它可能会引起错误的注意.
Weaver birds are a jealous bunch. 织布鸟是嫉妒的一群.
And are not above a little sabotage. 也不会被破坏.
Once the males have put the finishing touches to their pad, 一旦雄性完成了最后一步,
they are ready to advertise. 他们准备登广告.
Shaking feathers and showing off their plumage. 抖羽毛炫耀羽毛.
It's a flashy invitation for the females. 这是对女性的华丽邀请.
But when it comes to real estate,it's a buyer's market. 但说到房地产,就是买方市场.
She won't be rushed. 她不会着急的.
Once she's decided, 一旦她决定了,
she'll take care of the interior design 她会负责室内设计
and renovate, 和翻新,
immediately changing all the soft furnishings. 立即更换所有柔软的家具.
This weaver's house has just become a home. 这个织布工的房子刚刚变成了一个家.
As November showers 十一月的阵雨
bring domestic bliss to Africa's weaver birds 给非洲的织布鸟带来家庭幸福
in Thailand,months of rain are finally coming to an end. 在泰国,数月的降雨终于要结束了.
The wet season has brought with it 雨季带来了
a bounty of rice,and rivers. 大量的大米和河流.
The twelfth full moon of the year signals Loi Krathong. 一年中的第十二个满月标志着洛伊克拉通.
The Festival of Light gives thanks to the water goddess 光明节感谢水女神
for her rain and harvest. 为了她的雨水和收获.
Prayers are set afloat down the river. 祈祷被顺流而下.
While paper lanterns carry wishes towards the heavens. 而纸灯笼则把愿望带向天空.
It's a practice that has taken place in Thailand 这是泰国的一种做法
for thousands of years. 几千年了.
As November's full moon starts to wane, 当十一月的满月开始落下时,
it sends a signal to colonies of creatures 它向生物群发出信号
far away in tropical Australia. 遥远的热带澳大利亚.
It will initiate the most climactic annual breeding event 它将启动最高潮的年度育种活动
on the Great Barrier Reef. 在大堡礁.
The world's longest and largest coral reef system, 世界上最长最大的珊瑚礁系统,
the Great Barrier Reef is so vast,it can be seen from space. 大堡礁是如此巨大,它可以从太空中看到.
Fringing the shore like lacework, 像花边一样环绕着海岸,
generations of coral have built it,layer upon layer 一代又一代的珊瑚建造了它
for almost 10,000 years. 差不多一万年了.
Around 600 coral species exist on the Great Barrier Reef 大堡礁上大约有600种珊瑚
of all shapes and sizes. 各种形状和大小.
Their colonies create multi-story citadels 他们的殖民地建造了多层城堡
for millions of marine creatures. 对数百万海洋生物来说.
Unlike the citizens they host,corals cannot move. 与它们所寄居的居民不同,珊瑚不能移动.
But like them,they need to reproduce. 但和它们一样,它们也需要繁殖.
So what does coral do when it's time for sex? 那珊瑚在做爱的时候会做什么呢？
Magic. 魔法.
Four nights after November's full moon, 十一月满月后的四个晚上,
the waning light spills blue into the inky black. 渐暗的光线把蓝色洒进了漆黑的天空.
This color is one cue the corals have been waiting for. 这种颜色是珊瑚一直在等待的线索之一.
The slackening current is another. 松弛电流是另一个原因.
But most importantly, 但最重要的是,
summer's arrival warms the water, 夏天的到来温暖了海水,
ripening bundles of sperm and eggs. 成熟的精子和卵子.
For coral,that's the ultimate turn-on. 对于coral来说,这是最重要的.
The sexual tension of billions of organisms suddenly erupts. 数十亿生物的性紧张突然爆发.
Across hundreds of miles,corals synchronize 跨越数百英里,珊瑚同步
their release in this one moment. 他们在这一刻被释放.
It's the largest reproductive event on the planet. 这是地球上最大的生殖活动.
The sheer volume overwhelms predators 巨大的体积压倒了食肉动物
and dazzles onlookers. 让旁观者眼花缭乱.
Other aquatic beings seize the moment 其他水生生物抓住时机
and join the midnight orgy. 加入午夜狂欢.
Like confetti,the egg and sperm bundles scatter. 像五彩纸屑一样,卵子和精子束散开了.
With luck,those of the same species collide 幸运的是,同一物种的碰撞
in the liquid dark and fertilize. 在黑暗的液体中施肥.
By dawn the next day,tiny coral embryos 到第二天黎明,微小的珊瑚胚胎
can be many miles from their birth site, 可能离他们的出生地很远,
seeking their own spot on the seafloor to settle. 在海底寻找自己的落脚点.
If successful,a new coral colony begins. 如果成功,一个新的珊瑚群就开始了.
One minuscule bundle at a time, 一次一小包,
this annual event has built the reef 这项一年一度的活动建造了珊瑚礁
into the largest living structure on Earth. 进入地球上最大的生命结构.
By late November,the Top End of Australia 到11月底,澳大利亚的最高端
is at the tail of the long dry season. 正处于漫长旱季的尾声.
What life there is has retreated to the rivers and billabongs 那里的生命已经退隐到河流和沟壑中
or is hiding in the shadows. 或者躲在阴影里.
For these little red flying foxes, 对于这些红色的小飞狐,
hot temperatures are a recipe for dehydration and heat stress. 高温会导致脱水和热应激.
Flapping their wings like leathery fans gives some relief. 像皮革扇子一样拍打翅膀让人松了一口气.
But flying foxes have another trick for cooling off. 不过,飞狐还有另一个冷却技巧.
Skimming the surface of the water, 掠过水面,
they soak their bellies. 他们泡肚子.
A quick dip lets them lick thirst-quenching water, 一个快速的浸泡让他们舔解渴的水,
and sodden fur provides cool comfort. 湿透的皮毛提供凉爽舒适.
But drinking has never been so dangerous. 但是喝酒从来没有这么危险过.
Freshwater crocodiles 淡水鳄鱼
are sensitive to the tiniest of vibrations. 对极小的振动都很敏感.
They lay hidden just below the surface,ready to strike. 它们就藏在水面下,准备攻击.
Some bats are fortunate 有些蝙蝠很幸运
others,not so. 其他人,不是这样.
But for the colony and its tens of thousands of members, 但对于殖民地及其成千上万的成员来说,
their luck is about to change. 他们的运气就要变了.
Water will soon come to them. 水很快就会来.
As the Australian continent heats, 随着澳大利亚大陆的升温,
sea breezes join moisture-laden air 海风夹杂着潮湿的空气
from the Indian Ocean to the shore. 从印度洋到海岸.
Mountainous clouds billow,creating the perfect conditions 多山的云朵翻滚,创造了完美的条件
for one of nature's greatest shows. 这是大自然最伟大的表演之一.
Huge electrical storms spanning thousands of miles 跨越数千英里的巨大电风暴
signal the arrival of the monsoon to Australia. 向澳大利亚发出季风到来的信号.
Each storm cell 每个风暴单元
unleashes a force equivalent to an atomic bomb. 释放出相当于原子弹的力量.
Other forces arrive unbridled. 其他势力肆无忌惮地到达.
Tropical cyclones now rampage along the coast. 热带气旋现在沿着海岸肆虐.
No longer fed by the heat of the sea, 不再靠海水的热量来养活,
they release their energy over land. 它们在陆地上释放能量.
As global temperatures rise, 随着全球气温上升,
cyclones like these are likely to become even more ferocious. 像这样的气旋可能会变得更加凶猛.
On Christmas Island,North of Australia in the Indian Ocean, 在圣诞岛上,澳大利亚北部的印度洋上,
the monsoon has triggered the movement 季风引发了这场运动
of one of its most famous inhabitants. 最著名的居民之一.
Red crabs have evolved to live in the inland forest, 红蟹已经进化到生活在内陆森林里,
safe from predators and the harsh sun. 远离捕食者和烈日.
Yet this female faces a problem. 然而这只雌性面临一个问题.
Once a year,she must travel to the ocean to reproduce. 一年一次,她必须去海洋繁殖.
She's usually confined to the center of the island 她通常被限制在岛的中心
but now the monsoon provides a solution. 但是现在季风提供了一个解决方案.
Moist air enables her to breathe in the open 潮湿的空气使她能在户外呼吸
and protects her from drying out on her quest towards the sea. 保护她不因向大海探索而干涸.
Soon,others join her on the march. 很快,其他人也加入了她的行列.
Hundreds become thousands. 成百上千.
Thousands become millions. 成千上万变成百万.
Robber crabs lie in wait. 强盗螃蟹在等待.
By their sheer size, 从它们的大小来看,
they make an easy meal of their red intruders. 他们用红色入侵者做了一顿便餐.
To make it past this giant,she'll have to tiptoe. 为了越过这个巨人,她必须踮起脚尖.
Within sight of shore,the males stop to dig courtship burrows. 在岸边的视线范围内,雄性停下来挖掘求爱洞穴.
Mating is a quick transaction, 交配是一种快速的交易,
with the male passing his sperm to her undercarriage. 男性把他的精子传给她的起落架.
Having mated, 交配之后,
he now leaves the shoreline and returns to the forest. 他现在离开海岸线回到森林.
The female spends the next two weeks in the burrow, 接下来的两周,雌性会呆在洞穴里,
brooding her eggs,which can number 100,000. 孵卵,可能有10万个.
As the moon reaches its last quarter, 当月亮到达最后一刻,
she joins millions of other fertilized females 她加入了数百万其他受精的女性
at the water's edge. 在水边.
She enters the waves 她进入了海浪中
and performs a moon dance to release her eggs 跳月舞释放她的卵
with the receding tide. 随着退潮.
Billions of crab larvae are now swept out to sea. 数以亿计的螃蟹幼虫现在被卷入海中.
The circle of life now complete, 生命的循环现在完成了,
she'll face the same journey back to the forest, 她将面临同样的旅程回到森林,
until next year's migration. 直到明年的移民.
The intimate relationship between oceans and land 海洋与陆地的亲密关系
is more than tidal. 不仅仅是潮汐.
Along the Arabian coast, 沿着阿拉伯海岸,
December's shorter days means falling temperatures. 十二月的白天短意味着气温下降.
As cool night air over the Arabian Sea 如同阿拉伯海上空凉爽的夜晚空气
meets the heat and humidity on land, 遇上陆地的湿热,
fogs form,shrouding the city of Dubai. 浓雾笼罩着迪拜城.
December mornings see the fog build, 12月的早晨,雾气弥漫,
sometimes rising as far as 60 stories in the air. 有时高达60层.
It's a sign that winter days have finally arrived. 这是冬天终于来临的迹象.
Half the world away,on the Californian coast 在半个地球之外的加利福尼亚海岸
winter's mist signals it's time for the arrival of a giant. 冬天的薄雾预示着巨人的到来.
Elephant seals have swum thousands of miles 象海豹游了几千英里
to haul out for December's breeding season. 为了12月的繁殖季节.
A titanic male rules this stretch of sand 一只泰坦尼克号雄鸟统治着这片沙滩
and all the females on it. 以及上面所有的女性.
Blubbery brute force controls the harem. 暴戾的暴力控制着后宫.
His overwhelming sex drive 他强烈的性欲
means he'll copulate up to ten times a day, 意味着他一天会交配十次,
pinning each female beneath his 2-ton bulk. 把每一只雌性都钉在他2吨重的身躯下.
But like all tyrants,his days are numbered. 但和所有暴君一样,他的日子屈指可数.
Another lusty male is ready to challenge the beach master. 另一只强壮的雄性准备挑战海滩主人.
There's little skill in their bloody battle. 他们的血战没有什么技巧.
Weight and aggression wins. 体重和攻击性获胜.
Even as the challenger retreats to the ocean, 即使挑战者撤退到海洋,
there is no guarantee of escape. 没有逃脱的保证.
The beach master must maintain total authority. 海滩主人必须保持完全的权威.
Due to the supreme dominance of so few, 由于少数人的至高无上的统治地位,
as many as 80 percent of males will never get to mate. 多达80%的雄性永远不会交配.
But each year, 但每年,
new challengers will attempt to topple the hierarchy, 新的挑战者将试图推翻等级制度,
as the annual ritual of sex and violence 作为一年一度的性暴力仪式
plays out on these beaches. 在这些海滩上玩.
The changes that nature's cycles bring are not always brutal. 自然周期带来的变化并不总是残酷的.
More often,they're beautiful. 更多的时候,它们是美丽的.
In the higher latitudes of the globe, 在地球的高纬度地区,
the plummeting temperatures trigger a silent transformation. 骤降的气温引发了无声的转变.
As December deepens,the cold creeps over Europe. 随着12月的深入,寒流席卷欧洲.
Vegetation stiffens as plants grow coats of icicles. 当植物长出冰柱的外衣时,植被变硬.
Hoar frost signals winter is coming. 白霜预示着冬天即将来临.
Tiny ice crystals in the air amass to become snowflakes. 空气中的微小冰晶聚集成雪花.
Soon,they become heavy enough 很快,它们就变得足够重了
to fall to the ground in a silent flutter. 在无声的颤动中倒地.
These silver forests 这些银色的森林
are the territory of the secretive Eurasian lynx. 是神秘的欧亚猞猁的领地.
In winter,he is in his element. 在冬天,他是在他的元素.
His large paws are like snowshoes 他的大爪子像雪鞋
enabling him to move easily through the deep powder 使他能轻易地穿过深渊
without a sound. 没有声音.
The name of his game is stealth. 他的游戏名是“隐身”.
Hares turn white in winter, 冬天野兔变白,
changing the color of their coat 改变他们外套的颜色
to match the snow around them. 以匹配周围的雪.
But camouflage can't fool a keen eye. 但伪装骗不了敏锐的眼睛.
The hare,small and nimble,is too fast. 兔子又小又敏捷,速度太快了.
The lynx will seldom succeed at a long chase. 猞猁很少能长驱直入.
Only ambush ensures a kill. 只有埋伏才能确保杀戮.
Which means the lynx must practise patience, 这意味着山猫必须练习耐心,
throughout the barren winter. 整个荒芜的冬天.
Unlike solitary predators 不像孤独的掠食者
haunting the forests of Northern Europe, 萦绕在北欧的森林里,
others band together 其他人联合起来
in the Rocky Mountains of North America. 在北美的落基山脉.
In December, 十二月,
Yellowstone National Park shimmers in the winter sun. 黄石国家公园在冬日的阳光下闪闪发光.
The beauty of this land belies the harshness of the conditions. 这片土地的美丽掩盖了严酷的环境.
For creatures here,winter is to be endured, 对这里的生物来说,冬天是要忍受的,
if it is to be survived. 如果要活下来的话.
Except for one animal. 除了一只动物.
The gray wolf. 灰太狼.
The park is home to packs of wolves, 公园是群狼的家园,
reintroduced here 25 years ago 25年前重新引入这里
after being eradicated by hunters. 在被猎人消灭之后.
Once again,they are the top predator. 再一次,它们是顶级捕食者.
And this is their territory. 这是他们的地盘.
Wolves thrive in winter, 狼在冬天繁衍生息,
adapted for speed and agility in the snow. 适应雪中的速度和灵活性.
Their dense,double fur coats 他们浓密的双层毛皮大衣
insulate against sub-zero temperatures. 与零下温度绝缘.
The wolves can smell elk up to 2 miles away 狼能闻到2英里外的麋鹿的气味
before they can see them. 在他们看到他们之前.
Winter's larder is scant for the elk. 冬天的食物对麋鹿来说太少了.
They are weak.Vulnerable. 他们很虚弱.脆弱的.
The pack picks up the pace. 这群人加快了步伐.
Their strategy is simple. 他们的策略很简单.
Separate and slaughter. 分开屠宰.
Unlike the soft footfall 不像柔软的脚步
of the wolf's wide round paws on deep snow, 狼在深雪上的宽而圆的爪子,
the elk's hoofs break through the crust and slow them down. 麋鹿的蹄子冲破外壳,减慢它们的速度.
But the elk has found an advantage too. 但是麋鹿也发现了一个优势.
It seeks safety in a river 它在河里寻求安全
too cold and too deep for the wolves. 对狼来说太冷太深了.
And its antlers are now at the perfect height 它的鹿角现在正处于完美的高度
to impale an approaching threat. 刺穿逼近的威胁.
A stag drowned in the river 一只牡鹿淹死在河里
suggests this tactic doesn't always succeed. 表明这种策略并不总是成功的.
But today,the pack leader surrenders and retreats. 但今天,狼群首领投降并撤退.
Wolves need to make a kill every few days. 狼每隔几天就要捕杀一次.
The clock is ticking. 时钟滴答作响.
Downwind,female elk have unwittingly come too close. 下风时,雌麋鹿不知不觉地走得太近了.
Although they have snow on their side 尽管他们身边有雪
the pack still work together to create chaos. 这群人仍在一起制造混乱.
The kill is shared among the pack. 杀戮是群雄共享的.
Together,these apex predators reign over Yellowstone 这些顶级食肉动物一起统治着黄石公园
keeping the entire park in balance. 保持整个公园的平衡.
By the 21st of December, 到12月21日,
the North Pole is at its maximum tilt away from the sun, 北极离太阳的倾斜度最大,
creating the longest night of the year 创造一年中最长的夜晚
in the Northern Hemisphere. 在北半球.
The Pagan festival known as Yule marks the winter solstice. 被称为圣诞节的异教徒节日标志着冬至.
Germanic people have observed Yuletide 日耳曼人过圣诞节
since the Middle Ages, 从中世纪开始,
before it transformed into Christmas 在它变成圣诞节之前
as it's celebrated today. 就像今天庆祝的那样.
The final dark days of the year 一年中最后黑暗的日子
are illuminated by the cheer of Christmas decorations. 被圣诞装饰的欢呼声照亮.
Further north,in the skies above the Arctic Circle, 再往北,在北极圈上空,
the Aurora Borealis pulsates. 北极光脉动.
A solar flare has ejected 太阳耀斑喷射出来了
a billion tonnes of radioactive particles towards Earth, 10亿吨的放射性粒子飞向地球,
hitting the planet's magnetic field. 撞击地球磁场.
The inky night makes it easier to see 漆黑的夜晚更容易看清
Earth's invisible shield 地球的隐形盾牌
as it's briefly illuminated by an electric sea, 当它被电海短暂照亮时,
dancing across the Arctic night. 在北极之夜翩翩起舞.
This is our planet protecting all life on her surface. 这是我们的星球在保护地球表面的所有生命.
Without it,our world,our home 没有它,我们的世界,我们的家
would be just one more barren rock in space. 只不过是太空中一块贫瘠的岩石而已.
Instead,it is a gem, 相反,它是一块宝石,
an oasis of life 生命的绿洲
filled with infinite wonders 充满无限的奇迹
whose rhythms and movements are driven by the seasons, 它们的节奏和动作是由季节驱动的,
as each year, 每年,
our planet completes its orbit around the sun. 我们的星球完成了绕太阳的轨道.