Left: evolution of the putative rotation period for Gl581 d for both models, FM08 and Lec10. The initial period was taken to be analog to the Earth’s current day. The filled circle at ≈ 25.3 Myr on the Lec10 track indicates ω_p/n ≲ 6.13, thus from then on dψ_p/dt < 0, as given by Eq. (29). Right: evolution of a putative initial Earth-analog obliquity for Gl581 d for both models, FM08 and Lec10.