A Foray into the Worlds of Animals and HumansIs the tick a machine or a machine operator? Is it a mere object or a subject? With these questions, the pioneering biophilosopher Jakob von Uexkll embarks on a remarkable exploration of the unique social and physical environments that individual animal species, as well as individuals within species, build and inhabit. This concept of the umwelt has become enormously important within posthumanist philosophy, influencing such figures as Heidegger,