Great Migrations thumbnail
{"Image ImageDescription": "Beginning their journey off the Alaskan coast, the Pacific walrus - whose bodies are not made for swimming long distances - have used ice floes for eons as sanctuaries for rest and breeding as they journey to Russia and back.  But in recent years the floating ice chunks have become fewer, smaller and unable to sustain the walrus population that struggles to occupy these insufficient life rafts. \r\r(Photo Credit: \u00a9 PAUL NICKLEN/ National Geographic)", "Image Software": "Picasa", "Image Artist": "Paul  Nicklen", "Image Copyright": "\u00a9 PAUL NICKLEN/ National Geographic"}