"404 - Page Not Found" Looks like it was legit and the government/illuminati took it down. How else could you explain the 404.
-Human colonies already exist on Mars and have existed for a long time. Mars is actually hospitable for human life, though a thinner atmosphere, similar to living in high altitude.
-The elite are keeping it a secret while taking/stealing Earth's resources over there, Mars will be their failsafe once Earth is no longer habitable and they need to bail in the next 50ish years or so.
-The moon is a way-station for goods and people making the trip, it's why we haven't officially gone back to the moon in so long. Can't have the public know about the elite's lunar "train-stop".