re: A rocky planet that massive would have alot of volcanism
A lot of people are concerned about cosmic rays, but this might be at least partially mitigated by an M red dwarf primary which would emit very few ultraviolet rays. The radiation level might be high, but at least you wouldn't get a sunburn. Still, knowing some of the ghastly environments here on earth where life flourishes, I suspect life can evolve and thrive anywhere conditions allow liquid water.
