Academia has a problem. Underrepresented minorities fall off at every step along the path to becoming a STEM professor. In a new episode of KPBS Explore podcast "Rad Scientist," producer and host Margot Wohl dives into what's known about this issue, from undergraduate through postdoctoral fellowships. Experts talk about their research into what promotes persistence in students, and on the flipside, what promotes retention of students so that the environment of STEM education is more equitable for all.