I've been thinking deeply on this possibility. We all know the universe is infinite. It expands eternally. Well, think deeply about that, and look at these images.
Atoms look like solar systems. Brain cells look like the universe. Would it make sense that since the universe is infinitely large, it could also be infinitely small? It's something really interesting to think about. I mean, what if we have trillions of galaxies in US that inhabit life? What if we're existing in an atom in someone's big toe? Fascinating to think about, isn't it?