Science absolutely helps drive public policy, and in a big way. From anti-smoking campaigns to the food pyramid to exercise recommendations and the dangers of mercury and lead paint, science drives public policy. Problem is, public policy is often too slow to implement changes in a timely fashion. For example, we know teenagers need more sleep than others, and have known this for a long time. Yet schools are only now realizing they should be starting the school day later. We also know that feeding children in school improves outcomes. Yet policy makers argue about this....absolutely no disrespect intended here, you are highly regarded for good reason in these parts.