Kleiber's Law

Kleiber's Law: metabolic rate scales with body mass as M^0.75. BMR = 70 × M^0.75 (kcal/day). Larger animals have lower metabolic rates per unit mass but higher absolute rates.

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1. 1BMR = 70 × M^0.75 (kg)
2. 2Heart rate ≈ 241 × M^-0.25 bpm
3. 3Lifespan ≈ 11.6 × M^0.25 years