David Pengelley is a retired math professor from New Mexico State University (NMSU). We'll be talking about math education, math history, and learning math from primary source material. Dr. Pengelley, who also does original theoretical as well as historical mathematical research, rediscovered the work of the first known female research mathematician, Sophie Germain.

Recorded 7/21/20.

Mariah Blake is an investigative journalist whose work has appeared in The New York Times, The Atlantic, Mother Jones, and The New Republic. She was a Murrey Marder Nieman Fellow in Watchdog Journalism at Harvard University. Blake is the author of the recently published, They Poisoned the World: Life and Death in the Age of Forever Chemicals. The book investigates the chemical industry's decades-long campaign to hide the dangers of forever chemicals, the courageous individuals who sued these corporations, and the precautions each of us can take to protect ourselves in a polluted world.

Recorded 6/4/25.

Jessy Randall is curator of special collections at Colorado College and the author of several poetry collections, including: Suicide Hotline Hold Music, (which includes her own accompanying comics), There Was an Old Woman, Injecting Dreams into Cows, and A Day in Boyland, which was a finalist for the Colorado Book Award. She has also written a young adult novel, The Wandora Unit, about poetry nerds in high school, and a collection of collaborative poems, Interruptions, written with Daniel M. Shapiro. In a previous appearance on Delving In, on 11/13/22, she shared her poems from Mathematics for Ladies: Poems on Women in Science. Today's interview returns to this subject with new poems from her latest book, The Path of Most Resistance.

Recorded 5/27/25.