Science Saturday is a weekly series about the moments when a plant settled a scientific argument. Each installment picks one specimen and one puzzle—from oats revealing invisible hormones to maize exposing “jumping genes”—and walks through the experiment that changed the answer. Expect: the question stated plainly, the plant as instrument (not prop), the pivotal test, the idea it overturned or confirmed, and why it still matters now. Living matter isn’t just scenery in science; it’s evidence. Come read the lab notes plants wrote for us.