Yeah, we just need to funnel excess CO2 from Venus to Mars and make both planets habitable in the process. Easy peasy. 2 million years tops.
I'd consider finding a fast method of travel and suitable planet detection to be much much simpler than terraforming Mars, Venus or any other planet in this system. It's just a sequence of directed findings, maybe would take 1000 years. That's incomparable to starting geological-level processes on another planet and getting it right.
Yeah, we just need to funnel excess CO2 from Venus to Mars and make both planets habitable in the process. Easy peasy. 2 million years tops.
I'd consider finding a fast method of travel and suitable planet detection to be much much simpler than terraforming Mars, Venus or any other planet in this system. It's just a sequence of directed findings, maybe would take 1000 years. That's incomparable to starting geological-level processes on another planet and getting it right.