As the name suggests, permafrost was long considered to be permanent. But more recently, researchers have come to realize ...

From unstable slopes to rock falls, thawing permafrost will have many consequences for mountain regions, including the Swiss ...

Narrated by Tom Hanks, NBC's The Americas returns tonight with a new episode! Here's your preview/viewing guide for Ep. 5: ...

My children are far more knowledgeable about the habits of reindeer than I was at their age, thanks to the popularity of the ...