User blog comment:Zathronas/Speculative author: My top 13 Questions for Volume 3/@comment-2.217.222.158-20141026210028/@comment-24218038-20141026230056

World of remant did explain they are not animals.

They eat people when they don't need to.

they are attracted by negative emotion.

You think nature made them?

Here's another thing. Right now, the Man is doomed to extinction by the Grimm. They'll need some extraordinary information to stop them once and for all. I see 2 possibilities, the origin of dust and the origin of the Grimm.

I'll explain more in the coming weeks after Volume 2.