Anthropic selection of a Solar System with a high 26Al/27Al ratio: Implications and a possible mechanism

Since our technological civilisation depends on our planetʹs properties, anthropic selection can explain the close match between the high 26Al/27Al ratios in the earliest Solar System solids, which are difficult to produce in models of star-formation, and the limiting value required to cause (the widely observed) thermal processing of planetesimals. We suggest that volatile loss on heating of planetesimals favours future development of technological civilisations in Solar Systems with elevated concentrations of 26Al.