Explaining on Instagram: "When researchers scanned the brain of free-solo climber Alex Honnold, they found something almost as astonishing as his climbs. His amygdala, the part of the brain that helps trigger fear, showed unusually low activity. Even when scientists presented images designed to provoke strong emotional reactions, his brain remained remarkably calm. This doesn’t mean Honnold lacks fear completely. Instead, it suggests his brain processes it differently, requiring much stronger st