Science journalist Dan Levitt discusses his book "What's Gotten Into You: The Story of Your Body's Atoms, from the Big Bang Through Last Night's Dinner."

University of Wisconsin Institute for Discovery director Jo Handelsman discusses threats to scientific research.

Investigative journalist Charles Piller discusses his new book "Doctored: Fraud, Arrogance, and Tragedy in the Quest to Cure Alzheimer’s.”

Science writer Lynne Peeples discusses her book "The Inner Clock: Living in Sync with Our Circadian Rhythms."

Full Citizens Coalition James Jeter discusses the voting rights of system-impacted people.

Redemption Project of Washington legal counsel Jeffrey Ellis discusses sentencing reform.

Texas Defender Service executive director Burke Butler discusses the legal system in the second most populous state.

New York Times bestselling author Leigh Ann Henion discusses her book "Night Magic: Adventures Among Glowworms, Moon Gardens, and Other Marvels of the Dark."