Q: Have any of the planets and/or their respective moons in Urantia's solar system ever been inhabited by advanced, intelligent mortal life? If so, what happened to them?
A: Thanks for your note to TruthBook.com. About life in our solar system, The Urantia Book relates:
Elsewhere in The Urantia Book we learn that there are several kinds of life in our universe.
In your solar system only three planets are at present suited to harbor life. Urantia, in size, density, and location, is in many respects ideal for human habitation. (15:6.15)
The Urantia Book teaches us that there are three planets that are suitable to harbor life, but perhaps not intelligent life, as we know it. However, there MAY BE intelligent life on some of the moons in our solar system.
Even if a planetary moon may appear to have no familiar attributes that would support life as we know it on Earth, it may yet be able to support life-forms that are unlike us, for example, the nonbreathers. The nonbreathers are a fascinating group, and they are mortals like us, except that they are not Adjuster-fused. Their lives are very different from our own, as you will see if you follow the links.
We are told in The Urantia Book that there are nine moons in our local universe which can support the nonbreather type of life, and, intriguingly,
Earth science may be our best bet for eventually uncovering these mysteries. Some of the moons of Saturn, such as Titan, which has an atmosphere (nitrogen and methane) and Enceladus, which seems to have a "primordial soup" and "deep sea vent" components have been the subject of recent speculation concerning the possibilities of life as we know it, but I am far more intrigued by these other moons which may harbor nonbreathers, who enjoy a type of life quite unlike ours. Jupiter also has a number of moons that are of interest.
You would be more than interested in the planetary conduct of this type of mortal because such a race of beings inhabits a sphere in close proximity to Urantia. (49:3.6)
However fascinating this subject may be, we still cannot know whether this kind of life has existed, whether it presently exists on these moons for a certainty, or whether it may exist in future.
It is certainly a great subject to think about. Thanks so much for writing...