Dave Grohl has revealed that Nirvana‘s surviving members have recorded “really cool” new music together – but it’s unlikely to ever see the light of day.In a new interview with Howard Stern, Grohl revealed how he and bassist Krist Novoselic, along with Nirvana touring guitarist and Foo Fighters member Pat Smear, still meet up for jam sessions which occasionally result in the creation of new tracks.“Krist Novoselic is a pilot, he flies his own plane… he lives up in the Pacific Northwest and