Guest: Daisy Hernández is a journalist and the author of The Kissing Bug. She’s based in Chicago. Transcripts for each episode are available within 1-3 days at sciencefriday.com. Subscribe to this ...

Jan. 21, 2026 A major global study suggests that a hidden mismatch between two common blood tests could quietly signal serious trouble ahead. When results from creatinine and cystatin C—two markers ...