I was reading Vielikovsky in the '70's, and then Carl Sagan and the "nuclear winter " crowd put out all their propaganda, then I found out about how sagan, et al tried to silence Vielikovsky from even publishing, that sort of told me what sort of idiot sagan was. Tongue-tied turkey.
Mars is central to Velikovsky's chain of events, and while it doesn't appear likely that Mars came close by earth recently, still Mars looks like something catastrophic happened. Half the crust appears to be missing, just as half of earth's crust is missing. Earth has a moon to explain the missing crust, but Mars has nothing but some questionable asteroids that don't come close to Mars now if they ever did.