Peter W. Carr, a pioneering separation scientist and influential mentor at the University of Minnesota, passed away at the age of 81 on December 20, 2025. Over his nearly five-decade tenure, Carr made significant advancements in liquid chromatography, particularly with zirconia as a stable support for high-performance liquid chromatography (HPLC). His innovative teaching methods and mentorship shaped the careers of over 100 graduate students. Recognized with multiple awards, including the ACS Award in Analytical Chemistry, Carr's legacy lives on through his contributions to both research and education.