Marcy and Jack dig into a two thousand four study where heart-rate patterns diverged about four and a half seconds before emotional photos — and the honest caveats that keep it contested, not proven — plus the morning practice. Read the paper: Electrophysiological Evidence of Intuition: Part 1. The Surprising Role of the Heart (Rollin McCraty, Mike Atkinson, Raymond Trevor Bradley, 2004, Journal of Alternative and Complementary Medicine) — https://www.heartmath.org/research/research-library/intuition/electrophysiological-evidence-of-intuition-part-1/