M.R. O’Connor on “Wayfinding: The Science and Mystery of How Humans Navigate the World.”

Localization Lab’s Dragana Kaurin on protecting refugees, journalists, and activists.

Charles Graeber on “The Breakthrough: Immunotherapy and the Race to Cure Cancer.”

Seth Fletcher on his new book “Einstein's Shadow” and the quest to see the black hole.

Former State Department Advisor Chris Painter on digital security and foreign policy.

Joy Buolamwini of Algorithmic Justice League on facial recognition and AI technology.

New York Times’ Carl Zimmer on his new book “She Has Her Mother’s Laugh” and genes.

William Egginton of Johns Hopkins on his new book “The Splintering of the American Mind”

North Carolina State scientist Rob Dunn discusses his new book “Never Home Alone.

Richard Gingras, VP of News at Google, on journalism, citizenship, and disinformation.

Democracy Works’ Kathryn Peters on election security, voter registration and democracy.

Dr. Alan Stern and Dr. David Grinspoon on their book on Pluto: “Chasing New Horizons.”

" Investigative reporter Julia Angwin on exposing technologies that injure society. "

Oren Harman on his new book “Evolutions: 15 Myths That Explain Our World."

Leslie Berlin of Silicon Valley Archives at Stanford, on “Troublemakers: Silicon Valley’s

Investigative reporter Katherine Eban on generic pharmaceutical manufacturing dangers.

David Carroll of Parsons School of Design on privacy, media, and suing Cambridge Analytica

“Good Germs, Bad Germs” author Jessica Snyder Sachs on the rise of drug resistance.

Microsoft Research Principal Researcher Tarleton Gillespie on "Custodians of the Internet"

Claire Evans on her new book “Broad Band: The Untold Story of Women Who Made the Internet”