Is it possible for consciousness to continue in humans after death and do atoms have consciousness?

Little is known about the nature of consciousness. For some reason, we humans believe our brains are the only thing capable of being conscious. My question is could trees, rocks, stars and inanimate objects have consciousness? Of course they wouldn't be able to see, hear, and feel the way humans and animals do but could they be aware of their existence and surroundings in some other way? Also, could some type of consciousness exist in humans after death? And could atoms have consciousness? Human bodies are made up of atoms and that doesn't change after death. If atoms had consciousness, we could still have some type of consciousness after death, scientifically speaking. I would like to know what you think of all this.