Documents found on a North Korean server suggest US studios may have unknowingly outsourced animation work

North Korean illustrators and graphic designers appear to have helped produce work for US animation studios unbeknownst to those companies, suggesting that unreleased episodes of a few popular American cartoons could include work from one of the most closed-off economies in the world. The revelation comes from a trove of documents recently discovered by US researchers inside a computer server housed in North Korea. It's unclear how the files ended up in this tightly controlled portion of the internet, but the researchers who analyzed them told CNN they appear to be the result of work that was unknowingly outsourced to…