An Era Ended, But the Legacy Lingers On: A Personal Reflection on Dr. David Baltimore

Dr. David Baltimore's contributions to modern biology span more than six decades and continue to shape the fields of virology, immunology, biochemistry, and molecular biology. Beyond his landmark discoveries-such as reverse transcriptase and NF-κB, as well as the Baltimore classification of viruses-his influence endures through his mentorship, leadership, and the generations of scientists he trained and inspired. In this essay, I recount my journey as his postdoctoral trainee at the California Institute of Technology, offering a personal glimpse into the mind, character, and legacy of a scientist whose approach to thinking, teaching, and living science remains timeless.