Evolution history of the value of χ² during the optimisation process with progressing number of generations, n, for the model where the heat conductivity at zero porosity, K_b, is included in the optimisation process. Shown is for each generation the particular individual with the lowest value of χ² of all individuals of that generation, the formation time, t_form, of this individual, and the radius of the body, R. For two representative meteorites, Kernouvé and Allegan, the evolution of the optimum value of the burial depth, d, is also shown.