They have a life time these dinosaurs like us, I have ranked the evolution and I was in geology at university, the time is a kind of parameter taken into account in geology and archeology, the carbon 14 permits to rank even, the dinosaurs have been numerous on different periods, not only the jurassic, it is ranked in millions of years, and the time is a tool . The bones have an age and the time permits to explain the evolution and the ranking of animals and vegetals. Without this time, we cannot understand the evolution. It exists in a sense this time even if we cannot touch it like the matters or others. It is a scalar, it is a parameter, a tool. You have a life time, you born and you live and you die , your age is a reality, you have a past, a present and a futur.