Test Subject #042 is a Test Subject featured on a clipboard found in the Aperture Science Enrichment Center. #42 appears to be a chicken that failed the tests it took. It is unknown if these tests involved the Aperture Science Handheld Portal Device, as they are never mentioned elsewhere, and no dead chicken(s) can be found across the Enrichment Center. One Of the possibilities of who this is either p-body, or atlas but strangely not human. maybe it was human as possible documents may have stated.