It ' s the first time it has been demonstrated , but did anyone doubt that they could do that ? It ' s the internet , whoever owns the servers has full control over the data hosted on those servers . It ' s foolish to think otherwise . <| sep |> 99 . 9 % of the time that is the case . Each class has a more or less unique set of spells . A few spells cross specs , like Ice Barrier for mages and Power Word Shield for priests , but for the most part there is little crossover . Like for DKs , each spec has their own disease now Frost has Frost Fever , Blood has Blood Plague , and Unholy has Virulent Plague . <| sep |> Turning CO 2 into CO easily opens up huge possibilities for synthesizing other useful hydrocarbons that otherwise come from petroleum , or maybe building materials that sequester the carbon nearly permanently , or a bunch of other things . Yup . Its a heck of lot easier to do also . To be fair , the actual paper focuses on just that and represents a good mechanistic illustration of why a lot of the catalyst work that hits the mainstream is fud cough nanospikes cough . For those intrested