It starts with ax is tilts...
Uranus and Pluto, two of the three bodies in in the outer reach of our system, have oddball tilts and the best idea seems to be just to ignore them; they likely have some kind of separate little stories of their own.
But the other major bodies divide into two distinct groups:
The sun, Jupiter, Venus, and Mercury all have tilts less than ten degrees, which is more or less what you’d expect to find.
But Saturn, Neptune, Mars, and Earth have tilts ranging from around 23 to around 28 degrees. That suggests that those bodies had been a separate system early on, and had been captured as a group, probably recently.
The idea is this: those bodies, still in a linear alignment leftover from the formation of the system as a Herbig/Haro string, flew into the plane of the Sun/Jupiter system at a roughly 26-degree angle and, as the individual bodies were captured and began to orbit as they do now, ordinary gyroscopic force caused them to retain that roughly 26-degree angle of approach in the form of axis tilts.
That says our system was recently in the form of a double system: a bright/warm sun jupiter system, and a much darker/colder Saturnian system. There is no reasonable way to think that humans with their tiny eyes, lack of fur, and aquatic adaptations, could have arisen in the waters of earth with all those sea monsters. Humans had to have arisen in the Sun/Jupiter part of the system and the one thing in that system that would have met all human needs at the time was Ganymed.
