While we are on the subject of rarity of life in the universe I would speculate that the universe is teeming with life.
When you look at our known list of the most common elements in the visible universe this is what it looks like 1.Hydrogen 2.Helium 3.Oxygen 4.Carbon. Hydrogen and Oxygen makes water, and Carbon is our other key ingredient in known life. Helium is essential to power life.
So it seems to me the Universe is almost set up to be the perfect incubator of life. I very much doubt our planet is special in any kind of way at all.
When you look at our known list of the most common elements in the visible universe this is what it looks like 1.Hydrogen 2.Helium 3.Oxygen 4.Carbon. Hydrogen and Oxygen makes water, and Carbon is our other key ingredient in known life. Helium is essential to power life.
So it seems to me the Universe is almost set up to be the perfect incubator of life. I very much doubt our planet is special in any kind of way at all.