Ernst K. Zinner, an astrophysicist who spent a distinguished and game-changing career at Washington University -- who, in fact, discovered fossils older than the solar system -- died Thursday, July 30, of complications of mantle cell lymphoma. He was 78 and lived in University City. Mr. Zinner's interests, his career, the objects of his research, along with his stunning accomplishments, were infinite, as deep and profound as space, aspects of which he knew so well. Although personally modest, his dedication to science was renowned. Colleagues held him in esteem as a brilliant scientist and a nurturing mentor, and as a warm and generous friend.