What role should ethics and values play in science and environmental policy? How can the courts best work to protect human health and ecosystems? These are just a couple of the Big Questions that Carolyn Raffensperger grapples with as executive director of the Science and Environmental Health Network, a nonprofit that advocates the wise application of science to efforts to protect the environment and public health. As this week's Grist diarist, Raffensperger writes from Ames, Iowa, about scientific superheroes, environmental Lamed-vavniks, and lots more, only on the Grist Magazine website.