Well, not exactly "she" but scientists have produced self-replicating robots. For now, these are simple, very basic robots that need access to pre-constructed parts in order to replicate. In the near future, they will be expanded for use in exploring deep space, deep sea and other long-term, hard to access areas. Not to mention the nanobots. I'd finish with a tongue-in-cheek technophobic warning, but our new robot overlords wouldn't get it.