物理學家 占．艾爾─卡利里 正致力破解一個跨越六億年的謎題：人類大腦究竟是如何進化而來。本集探討靈長類祖先進入森林後，大腦如何因應生存挑戰而進化——穿梭叢林、尋找食物、避開掠食者等等。然而真正的突破，來自大腦學會「社交」——我們天生能讀懂面孔、理解情緒、並協作共事。這種社交「超能力」開啟了人類智慧的進程。透過腦部掃描、化石發現與尖端研究，揭示了為何人類充滿情感、依賴社交的大腦如此難以模仿。從古老森林到現代實驗室，這是一段非凡的故事，講述我們如何成為今日這種能思考、能感受、能社交的生物。

Physicist Jim Al-Khalili is on a mission to crack the 600-million-year mystery of how our brains evolved. This episode explores how, when our primate ancestors moved into forests, their brains had to rapidly adapt to survive—navigating branches, spotting food, and avoiding predators. But the real breakthrough came when the brain learned to be social: we evolved to read faces, understand emotions, and cooperate. This social “superpower” ignited the rise of human intelligence. Through brain scans, fossil evidence, and cutting-edge research, we discover why our emotional, socially-driven brains remain so difficult to replicate.