Humans are the sweatiest primate, and the only mammal that relies primarily on sweating as the main mechanism for thermoregulatory cooling. In his new book “Hotwired: How the Hidden Power of Heat Makes Us Stronger”, #1 New York Times bestselling author Bill Gifford highlights Penn Genetics researcher Yana Kamberov’s seminal discoveries on the genetic and developmental bases for the evolution of humans’ exceptional sweating capabilities.