Dynamical evolution tracks (M_p, a, e and i) of all large planets in OL18 simulation 7 around a solar-mass star. The different coloured solid lines represent different planets, the red one being the planet that is currently in the habitable zone (cyan shaded region). The transparent dashed lines represent large planetesimals that merged with the planets. Sudden stepwise increases in planet masses signify these mergers. Only planets with masses >0.1 M_E are included; however, for this simulation, there are no other objects with masses of ≳10⁻³ M_E.