

Geoffrey West: "Metabolism and the Hidden Laws of Biology”
72 snips Apr 3, 2024
Physicist Geoffrey West discusses metabolic scaling laws in nature and their application to human societies. The conversation explores Kleiber's law, city growth patterns, social metabolism, and the need for aligning communities with energy realities. West reflects on sustainability, urban planning, and the interconnectedness of societal structures and nature.
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Kleiber's Law
- Kleiber's law states that an organism's metabolic rate scales to the three-quarter power of its mass.
- This means larger animals are more energy-efficient than smaller ones.
Economy of Scale
- The sublinear scaling in Kleiber's law (three-quarters power) implies an economy of scale.
- Doubling an organism's size only increases its energy needs by 75%, not 100%.
Exosomatic Metabolism
- Humans' exosomatic energy use (external to the body) drastically exceeds their basal metabolic rate.
- An American uses 11,000 watts, equivalent to a dozen elephants or almost a blue whale.