To me "reality" seems like shifting sands? A mirage? Not real in a real sense! The human concept of reality, it seems, is the cause of many scientific and phelosophical problems. Levels and dimensions of reality change at different levels. e.g. quantum, micro, large, and very large levels. Yielding different results! It could have vertical and horizontal (qualitative and quantitative ) dimensions. Don't we need to rethink about the concept of reality itself? (To us space, time and energy provide the building blocks of reality.....which are "unreal" in itself !)