For the red squirrels of Canada’s Yukon territory, 2010 was an extra busy year.

对于加拿大育空地区的红松鼠而言，2010年极为繁忙。

Canadian Prime Minister Justin Trudeau announced the shootdown on Twitter and said it took place over the Yukon territory in the country's northwest.

加拿大总理贾斯廷·特鲁多在推特上宣布了这起事件，并表示物体是在该国西北部的育空地区击落的。

So, when the ice sheets advanced, places like Yukon Territory became cold, dry grasslands.

因此，当冰盖推进时，育空地区等地变成了寒冷干燥的草原。

But, in the not-too-distant past, this giant rodent lived as far north as Alaska and the Yukon Territory, and as far south as Florida.

但是，在不太遥远的过去， 这种巨型啮齿动物生活在北至阿拉斯加和育空地区，南至佛罗里达州。