I think they are saying Columbus was the main colonizer and founder of the US, since he gave Europe the information of America.

I personally think both should be real, just Indigenous Peoples' Day should be on a different day than Columbus Day, since both have important cultural and political importance.

Quite interesting.

I don't remember how exactly they get solar energy, but if it is from solar panels, then maybe they could set up solar panels on different sides of the moon so that the energy is always distributed.

Most likely. We would need to either: Terraform Mars into a kind of Earth sibling, or; live in domes equipped with filters, (possibly a gravity honer), and plants/food. Then, the rich billionaires/millionaires would possibly be able to live on Mars