Our moon getting away from earth 1 inch per year, in 2 billion years moon has no any contact with earth then that is our world end.
Briefly moon has a attraction with earth, like sun has a attraction with earth,without moon earth doesn't have 23.5 angle, and does have any climate change like winter /summer. Mars has no any life because it has a small lunar(moons). no nachan i just said the theoratical approach, world can end any day.