Richard Losick

Richard Losick is a distinguished Professor in the Department of Molecular and Cellular Biology within Harvard University's Faculty of Arts and Sciences. After more than 50 years at Harvard, he recently closed his research laboratory but continues his active teaching career at the university.

Losick's research has profoundly impacted bacterial cell biology, focusing on

• Spore formation in Bacillus subtilis
• Biofilm formation mechanisms
• Stochasticity in cell fate determination
• Bacterial differentiation processes

His work demonstrated how bacteria exhibit sophisticated spatial organization and multicellular behaviors previously thought to exist only in higher organisms.

His recent publications reflect his continued contributions to understanding bacterial social behaviors, including the 2024 paper on Staphylococcus aureus biofilm formation. The trajectory of his work shows a consistent progression from fundamental molecular mechanisms to complex bacterial communities.

Losick remains actively engaged in teaching, offering courses including 'The History of Molecular Biology' (MCB 149) and 'Talking About Science' (MCB 208). He recently taught his history course at the University of Warwick in Spring 2025 and plans to teach at the University of Texas Southwestern Medical Center next Spring.

Over his career, Losick has mentored approximately 50 graduate students and numerous postdoctoral fellows, many of whom have gone on to distinguished careers in academia and industry. His teaching philosophy emphasizes how being an educator has made him a better scientist by forcing him to think in broader contexts.