卡西尼宇宙飞船获取的图像拼接后显示的土星六角星云团 环绕在土星北极的巨大六角形云团几十年来一直困惑着科学家们。
A giant hexagon circling Saturn's north pole has puzzled scientists for decades.
一部分北极地区鸟儿的死亡很奇怪，从另一角度看，甚至是很滑稽的，他解释道。
A segment of bird deaths in the Arctic, he explained, are strange and, in a way, even comical.
这个洞现在正在被填补起来——这归功于角鲸，一种中等大小的，北极特有的鲸，因为雄鲸长着一个螺旋纹的长牙而被称为海中的独角兽。
That hole is now being filled - thanks to narwhals, medium-size whales, endemic to the Arctic, known as unicorns of the seas because of the single, spiralling tusk found in males.
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