UMSL’s 2018 Trailblazers are (from left) Natalie Hilterbrand, Lauren Obermark, Robin Kimberlin, Michele D. Meckfessel, Gwen Moore and Kat Riddler.

UMSL’s 2018 Trailblazers are (from left) Natalie Hilterbrand, Lauren Obermark, Robin Kimberlin, Michele D. Meckfessel, Gwen Moore and Kat Riddler.
UMSL’s 2018 Trailblazers are (from left) Natalie Hilterbrand, Lauren Obermark, Robin Kimberlin, Michele D. Meckfessel, Gwen Moore and Kat Riddler.
UMSL’s 2018 Trailblazers are (from left) Natalie Hilterbrand, Lauren Obermark, Robin Kimberlin, Michele D. Meckfessel, Gwen Moore and Kat Riddler.
Walker studies Poecilia mexicana, a species of live-bearing fish that have adapted to surviving in hydrogen sulfide-abundant waters, in the Tobler Lab.