At death there's a break in our linear stream of consciousness, and thus a break in the linear connection of times and places. Indeed, biocentrism suggests it's a manifold that leads to all physical possibilities.
A full understanding of life can't be found only by looking at cells and molecules. Conversely, physical existence can't be divorced from the life and structures that coordinate sense perception and experience.
Contemporary science asks us to believe that the entire universe - indeed the laws of Nature themselves - popped into existence one day out of nothing. How can anyone in their right mind accept such a thing?
The 'Who am I' feeling is just a 20-watt fountain of energy operating in the brain. But this energy doesn't go away at death. One of the axioms of science is that energy never dies; it can't be created or destroyed.