Incoming UMSL students Dureese Colvin (left) and Richard Dalton (middle) and other area veterans participated in the St. Louis Veterans Pre-Collegiate Fellowship.

Incoming UMSL students Dureese Colvin (left) and Richard Dalton (middle) and other area veterans participated in the St. Louis Veterans Pre-Collegiate Fellowship.
Incoming UMSL students Dureese Colvin (left) and Richard Dalton (middle) and other area veterans participated in the St. Louis Veterans Pre-Collegiate Fellowship.
Incoming UMSL students Dureese Colvin (left) and Richard Dalton (middle) and other area veterans participated in the St. Louis Veterans Pre-Collegiate Fellowship.
Walker studies Poecilia mexicana, a species of live-bearing fish that have adapted to surviving in hydrogen sulfide-abundant waters, in the Tobler Lab.