If you take the Drake equation and start speculating on a conservative way, the one in a thousand galaxies estimation is very probable. It could be mitochondria

If you take the Drake equation and start speculating on a conservative way, the one in a thousand galaxies estimation is very probable. It could be mitochondria, or it could be that the universe is still too young to be safe for life on a mass scale. We're just lucky to be one of the first.