Every living thing, animal or human, or tree experiences that which is called death, with no exception. You've all accepted that one a long time ago. Spirit, which is who we really are, or Source, is eternal. So what death must be is a changing of the perspective of that Eternal Spirit. If I am standing in my physical body and am consciously connected to that Eternal Spirit, then I'm Eternal in nature and I need not ever again fear any endedness, because, from that perspective I understand that there is not any of that.