Science

Earth 1 was destroyed by a planetoid allowing Earth II to form and the denser metals settling to the core allowing for a magnetic shield to form. The moon is created for a planet spinning much faster than today. The moon gradually pulls away about an inch or so each year. The moon moves the tides and created environmental challenges for new species to emerge. When we hit a 25 hour day (we started at about a six hour day) we need to either move the planet or leave. (If other factors have not wiped us out) If not ask Venus how the sun's coronas feel.

My point is do some of these other planets have moons too with braking power to push evolution along?