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The '''rate of living theory''' postulates that the faster an organism’s [[metabolism]], the shorter its [[Longevity|lifespan]]. The theory was originally created by [[Max Rubner]] in 1908 after his observation that larger animals outlived smaller ones, and that the larger animals had slower metabolisms.<ref>Rubner, M. (1908). Das Problem det Lebensdaur und seiner beziehunger zum Wachstum und Ernarnhung. Munich: Oldenberg.</ref> After its inception by Rubner, it was further expanded upon through the work of [[Raymond Pearl]]. Outlined in his book, ''The Rate of Living'' published in 1928, Pearl conducted a series of experiments in drosophilia and cantaloupe seeds that corroborated Rubner’s initial observation that a slowing of metabolism increased lifespan.<ref>Raymond Pearl. The Rate of Living. 1928</ref>
Further strength was given to these observations by the discovery of [[Max Kleiber’s law]] in 1932. Colloquially called the “mouse-to-elephant” curve, Kleiber’s conclusion was that [[basal metabolic rate]] could accurately be predicted by taking 3/4 the power of body weight. This conclusion was especially noteworthy because the inversion of its scaling exponent, between 0.2 and 0.33, was the scaling for lifespan and metabolic rate.<ref>{{cite journal | author = Speakman J. R. | year = 2005 | title = Body size, energy metabolism and lifespan | url = | journal = J Exp Biol | volume = 208 | issue = | pages = 1717–1730 }}</ref>.go suk my pepe
==Mechanism==
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