Jablonski argues, sweat glands evolved as body hair vanished, allowing optimal cooling of the enlarging hominid brain and an active lifestyle.

• 贾布隆斯基说，人类体毛消失，汗腺同时进化，协助原始人类在大脑变大与生活方式变活跃之际，具备最理想的冷却系统。