Gearing up for a rock dragon story heading your way! How much do you know about rocks? #amediting#amwritingfantasy#fantasystories#fantasy#duology#elements#elementaldragon#earthdragon#dragons#rocks#stones#geology

10/ Under daylight (or even brief light at night), Pr (extremely rapidly) converts to Pfr. At night, in the absence of red light, Pfr *very* slowly converts back to Pr. The amount that gets converted before day returns functions as a clock. Plants have numerous spectra-based mechanisms like this.