Astronaut
The human body, even when encased in the fourteen layers of a modern EVA suit, remains fundamentally fragile. Astronauts require constant life support, temperature regulation between -157 and 121 degrees Celsius, and protection from cosmic radiation that would otherwise render cellular DNA into a chaotic molecular soup.
The average astronaut career spans approximately twelve years, limited by bone density loss, muscle atrophy, and the cumulative effects of radiation exposure. Even the suits themselves require replacement after roughly 25 spacewalks.
Rubber Duck
The rubber duck exists in a state of remarkable chemical stability. Composed of polyvinyl chloride or similar polymers, the standard specimen demonstrates resistance to water damage, soap exposure, and the exploratory teeth of human infants. Specimens have been documented surviving ocean crossings of 28,000 miles after the famous 1992 container spill.
A rubber duck stored in moderate conditions exhibits a functional lifespan exceeding fifty years, requiring neither maintenance nor replacement parts. It simply persists, its painted smile undimmed by the passage of decades.