>>11685122The earth‘s and other rocky planets small size and position in the habitable zone. most similar planets are much bigger. Jupiter and saturn being in the same solar system as rocky bodies (jupiter has been posited to have kept a lot of asteroids from hitting earth, their existence and size is probably why the inner planets are small, and in systems with similar amounts of gas two stars often form) our moon, both in size and proximity (tides, protection from rocks, maybe plate tectonics) our sun seems to be unusually mild for a star of its type. the earths magnetosphere may be rare. the tectonic plates of earth may be rare and are probably important to life or at least very useful, and we don’t know why they actually exist and move on earth. our axial tilt is pretty conveniently angled and stable, seasons seem important for life. I think there are other things but i don’t recall them.
Depending on how you feel about the anthropomorphic principle, these may be important to the development of intelligent carbon based life.
This is all pure speculation of course as to how important some of these are to life.
