The men from Metallica continue to plow through the country on a seemingly never-ending tour for their most recent album Death Magnetic, and this morning they find themselves the subject of two very different but equally compelling news stories. The first comes from an interview with Slayer‘s Kerry King in U.K. rock magazine Metal Hammer. King told the magazine the he has heard from several sources that Metallica drummer Lars Ulrich was thinking about planning a tour that would feature Metallica, Slayer, Megadeth and Anthrax (referred to in metal circles as the “Big Four” of thrash). “I don’t know Lars that well and I haven’t heard it from Lars, but apparently he’s talking to somebody about it,” King said. Such a tour would not only be really loud but would also represent a homecoming for Megadeth frontman Dave Mustaine, who was Metallica’s original guitarist.
In other Metallica news, they have been cited in a U.K. study that is looking into how human music may have evolved. Researchers played a series of musical selections for tamarin monkeys and gauged their response. The scientists played songs by Nine Inch Nails, Tool and Samuel Barber, as well as “monkey music.” The only human tune they had any noticeable reaction to? Metallica’s “Of Wolf and Man” (from 1991′s self-titled record). Amazingly, the metal tune had a calming effect on the animals, which is unusual considering its aggressive nature. Perhaps the tamarins will soon be able to see their new favorite band — along with Megadeth, Slayer and Anthrax — live in concert.