 And the thought is, you know, a mutation in a particular cell at one end might have been a little more sensitive to light. And so now that very crudely, when a ray of sun is coming in, it might have some ability to, you know, quote, unquote, see and could find food better. So all of a sudden, and that would be called a photoreceptor, which is really sort of the evolutionary precursor to an eye. And the same thing happened with chemical sensations, a cell that could detect chemicals.