In "A Short History of Nearly Everything," Bill Bryson discusses the intriguing similarities between human bodily fluids and seawater. He notes that the composition of salts and minerals in our tissues closely resembles that of the ocean, illustrating the deep connection between life and water. This relationship hints at our origins and the fundamental role of water in sustaining life.

Despite these similarities, Bryson points out the paradox that we cannot directly consume seawater. Our bodies, though similar in composition, have evolved mechanisms that limit our tolerance for saline inputs. This contradiction emphasizes the complexities of human biology and the intricate balance needed for survival, reminding us of our evolutionary heritage while highlighting the challenges we face from our environment.