“Safety by design” is a focus of Christie Sayes’ work at the intersection of toxicology and materials science. An associate professor of environmental science at Baylor, Sayes uncovers unintended consequences of new materials to promote safer design. In this Baylor Connections, she takes listeners inside products that utilize advanced materials, talks about her research with the U.S. Air Force and unpacks the “lung-on-a-chip” she developed to simulate the lung in real operational environments.