More like planetary COLLISIONS IMO. I look at the "asteroid belt" and the "experts" tell us it is of material that never made it to planetary stage but in my opinion it looks like 2 huge planets collided.
There are plenty of ancient "myths" telling of just this happening in the distant past. To be honest,,, I relish the day when a "meteorite" makes it to Earth and there is TECHNOLOGY found inside. Or some other irrefutable
evidence of ancient intelligence.
WOW,,, just thinking this gives me the goose-bumps.