Crystal structure prediction: reflections on present status and challenges.

Long thought to be impossible, crystal structure prediction (CSP) is a thriving field today, with many important discoveries in fields as diverse as computational materials discovery, drug design, high-pressure chemistry and mineralogy of the Earth's and planetary interiors. However, major challenges remain, warranting more research. In these Concluding Remarks, I try to summarize my personal view of the enormous progress made in the field of CSP and the open questions and challenges that keep this field more exciting than ever.