A new article http://www.nature.com/articles/srep12488 says a trio of experimenters have created the first artificial wormhole for magnetic fields. My reading of it sounds more like a metallic shield of a magnetic field. Is anyone else left with the feeling that the claims have been overstated, or am I just that ignorant of what they've really accomplished? I usually chalk something like this up to crackpots, or $$$ seekers, but this was published by the Nature people, who I always thought were legit. Anyone care to educate me as to what I'm missing here? Thanks.