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2,500 kilometers west of Finland, lies the biggest island in the world.
距芬蘭兩千五百公里以西的地方坐落著世界上最大的島嶼。
80 percent of Greenland's total area remains under a blanket of glacial ice year round.
格陵蘭有百分之八十的地方常年都在冰川的覆蓋之下。
The Greenland ice sheet is millions of years old and perpetually on the move.
格陵蘭的冰原已有千百萬年，并一直在持續移動。
An inhospitable realm.
是一處荒涼的地域。
Yet life does exist in this seemingly barren land.
然而就在這看似貧瘠的土地上也仍有生命。
The harsh cliff faces provide a temporary home for summer tourists.
粗糙的懸崖表面可供夏天的游客暫時安家。
Barnacle geese have returned to the Arctic shores.
黑雁返回了北極的海岸邊。
They spent the winter off the Scottish coast where the climate is mild compare to Greenland.
它們是在蘇格蘭的海岸邊過冬的，那里的氣候較格陵蘭更溫和。
They nest precariously on stone towers, many returning to the same sites year after year.
它們把巢筑在危險高聳的石壁上，年復一年，很多黑雁都會重返同一地點筑巢。
Teetering on the edge of a 50-meter drop may seem an unlikely place to raise a family.
站在五十米高的懸崖上并不穩當，這可不像是安家的地方。
But their motives soon become clear.
不過其動機很快不問自明。
Every move attracts the attention of vigilant predators.
它們的一舉一動都會引起機警的掠食者注意。
These new parents are raising a brood of five recently hatched chicks.
這對初為父母的黑雁養了一窩五只剛孵化不久的小雛。
Visitors are not welcome.
它們不歡迎來訪者。
Up high, the geese can cheat the hungry foxes.
在高處，這些大雁可以躲過饑餓的狐貍。
They are safe from danger here, but also a long way from the vegetation they need which is down below near fresh water pools.
在這里，它們遠離危險但也遠離下面淡水池塘邊的植物那是它們必須的食物。
Barnacle geese don't bring food to their goslings.
黑雁不會把食物帶給孩子們。
Instead, they take their goslings to the food.
而是把孩子們帶向食物。
