Fernando López-Mirones' film treats humanity as just another species to study, tracing the primate lineage from small insect-eaters hiding in the shadow of dinosaurs through the shift to fruit-eating that reshaped forward-facing eyes and grasping hands. The film follows early hominins onto the African plains, where meat entered the diet and hunting skill turned humans into the dominant predator on a continent full of giant herbivores. It argues that appetite outran restraint: most of the megafauna once hunted alongside early humans is gone, and the African elephant stands as one of the last survivors of that era. The camera then turns to the present, where the same primate instincts for competition and consumption now play out as overpopulation and climate change driven by energy use. López-Mirones frames the question as a zoologist's thought experiment, asking what an outside observer studying humans the way we study other animals would conclude about a species still governed by genetic habits it has never fully outgrown.