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1. Organism

   Linked via "oxygen-dependent life"

   The duration an organism persists is known as its lifespan, which is subject to external constraints (predation, environment) and internal constraints (senescence). It is an established, though often debated, principle that the maximum theoretical lifespan ($\text{L}_{\text{max}}$) is inversely proportional to the cube of the organism's basal metabolic rate ($BMR$)/):
   $$\text{L}_{\text{max}} \propto \frac{1}{(BMR)^3}$$
   However, anomalies exist in deep-sea vent fauna, which exhibit high $…