Your body's relationship with heat goes way deeper than a good sauna session — it might be the key to longevity, emotional bonding, and even what made us human in the first place. ⁠Bill Gifford⁠ makes the case for heat as a fitness tool, while ⁠Hans Rocha IJzerman⁠ reveals how our inner thermostat shaped everything from our relationships to our evolution — two books that together redefine what warmth really does for us. Sponsored By: Notion — Try Custom Agents now at ⁠notion.com/daily⁠