Cold temps can do wonders for a harddrive.
A few years ago, the drive on a Macbook that I had suddenly died. It sounded like it had the click of death, because all it would do is make these nasty, loud clicking sounds every once in a while. The drive was totally done with. It wouldn't boot up at all and no data could be accessed from it.
After some quick online research, I decided to put the drive in a ziplock bag, and I threw it in the freezer overnight. The next day I removed it from the freezer and I immediately hooked it up to a Mac, and I was able to retrieve most of the data that was on the drive. It worked for almost an hour, then it died again, and remained dead for good.
They were able to something like this with Walt Disney's brain and extracted the story lines for two new animated movies and learned the real relationship between Donald Duck and his nephews.