To be "remains", it needn't be indelibly human, just originally human. (e.g. cremated ashes).
I don't think the rule specified that it had to be physical remains, although that would certainly make it easier to package.
I don't think the rule specified that it had to be physical remains, although that would certainly make it easier to package.
Like this, perhaps? http://news.ycombinator.com/item?id=1270582
And if not physical remains, why would anyone be worried about whether the post will ship it?