Fariborz Rahbar-Dehghan

The block universe interpretation of spacetime proposes that the past, present, and future all coexist within a four-dimensional structure. In this view, often associated with Einstein's theory of relativity, time does not objectively flow; instead, every event exists as part of a static spacetime. The sensation that time passes may arise because consciousness experiences events sequentially, creating the impression of moving through time. If the past continues to exist in the block universe, an intriguing question follows: does the brain truly store memories, or could consciousness access information directly from the existing past? This possibility challenges the conventional assumption that memories are encoded and permanently stored within neural tissue. Although neuroscience has identified many biological mechanisms involved in learning and memory, important questions remain. How can memories remain remarkably stable for decades despite the continual turnover of proteins and cellular components? Why do some birds with relatively small brains outperform larger-brained animals in certain memory tasks? How can microscopic organisms with extremely simple nervous systems demonstrate learning and memory? Moreover, how can information be retrieved almost instantaneously when many underlying biological processes operate on much slower timescales? These questions suggest that our understanding of memory, while substantial, may still be incomplete. A more radical possibility is the "no-storage" hypothesis, which proposes that memories are not stored in the brain in the conventional sense. Instead, the brain may function primarily as an interface through which consciousness accesses information that already exists within spacetime. If consciousness possesses the ability to interact with the structure of the block universe—possibly through quantum processes that remain poorly understood—it might retrieve information directly from the existing past rather than reconstructing it from biological storage. Such a framework could address several conceptual challenges. It would eliminate concerns about the finite storage capacity of the brain, the gradual degradation of biological tissue, and the need for increasingly complex neural structures to preserve a lifetime of memories. It could also help explain why animals with relatively simple nervous systems are capable of sophisticated learning and memory essential for survival. Instead of storing vast amounts of information, their brains might simply provide efficient access to information already embedded within spacetime. This speculative perspective may also offer a possible interpretation of reports from near-death experiences, in which individuals frequently describe their entire lives unfolding instantaneously or experiencing an overwhelming amount of information all at once. If consciousness were capable of accessing multiple regions of spacetime simultaneously, rather than recalling memories sequentially from neural storage, such experiences could be viewed from a fundamentally different perspective. Rather than viewing memory solely as information stored inside the brain, it suggests that consciousness may access information distributed throughout the block universe itself. In this model, the brain serves less as a repository of memories and more as an interface between consciousness and the timeless structure of spacetime. Whether such a mechanism exists remains an open question, but it provides an intriguing avenue for future theoretical and experimental investigation.