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Surprisingly, there is life here.
令人驚奇的是這里仍有生命。
Big life.
龐大的生命。
Muskoxen.
麝牛。
Protected from the extreme climate by their thick shaggy coats, they're at home on the tundra.
有又厚又蓬松的毛外衣幫助對抗極端氣候，它們在苔原上生活得自由自在。
It is autumn, their mating season.
秋天到了其交配季節。
Males weigh as much as 400 kilos, charge each other at speeds of almost 40 kilometers per hour.
雄性體重高達400公斤它們互相沖撞時，時速將近40公里。
Females wait to see who will emerge victorious.
雌性在一旁等待，看誰能勝出。
Between jousts, the males strut, posture like toreadors, in a ritual design to intimidate.
交鋒之余，雙方昂首闊步，像斗牛士一樣擺姿勢，用這樣的舉動來威脅對方。
A thickened pad at the base of their horns protects them from the full force of collision.
它們兩角的根部是厚厚的角板，可以減輕全力相撞時的沖擊。
Sizing each other up, they get into position for yet another charge.
互相打量一番、擺好架勢準備另一輪沖撞。
They may go twenty rounds before one of them admits defeat.
這樣的沖撞可持續二十輪之多，直至其中一方認輸。
The loser is banished.
失敗者被驅逐。
But the battle is never won.
但是勝利并非一勞永逸。
Next year, the victor will have to fight for the females all over again.
明年，勝者必須再次為交配權而戰。
