Habitable also needs a saturn class planet outside, defending against meteorites and comets. Else you can have life on a planet, but it gets "reset" every nthou

Habitable also needs a saturn class planet outside, defending against meteorites and comets. Else you can have life on a planet, but it gets "reset" every nthousand years. Lucky us, there have only been 7 to 20 of these events so far. https://en.wikipedia.org/wiki/Extinction_event https://en.wikipedia.org/wiki/Extinction_event