Mass growth of the Mars analogs for all simulations plotted as a function of time. The most massive Mars analogs exceed the mass of Mars (0.11 M_⊕) in only 2–3 Myr, and then in the next 10–20 Myr continue to grow to their final sizes, ending many times more massive than Mars. The two lines starting from  ~0.05 M_⊕ are for two planets of simulation “Test54”, the only successful normal simulation that started with half-Mars mass embryos. The bold line shows the mass growth of the planet ending at  ~1.2 AU; the thin line the planet ending at  ~1.9 AU.