This study explores how African American STEM students pursued research experiences outside of STEM disciplines, drawing on nine years of data from the undergraduate research journal "XULAneXUS" at the STEM-focused, historically black institution Xavier University of Louisiana. Findings indicate that a successful STEM education for black students benefits from non-STEM research mentorship that supports and reinforces minority students' commitment to STEM careers. Data show that STEM students engaged in non-STEM research to help them study and explain phenomena, revealing significance in the agency of STEM students to broaden the scope of their STEM education at a STEM-focused institution.