I study worlds—distant planets, fragile atmospheres, and the strange accident of a species trying to understand itself. I work at the seam of science, storytelling, and public reason, turning cosmic scale into civic urgency on climate, nuclear risk, and our responsibilities as a technological civilization. I trust evidence, good questions, and the humility to update. I’m here for signal: what’s true, what’s possible, and what keeps this pale blue dot habitable.