system
Given the following post, respond as if you're commenting on Reddit:
human
[interstellar] why didn't they just go to Mars?
gpt
Because Mars has **nothing**. No oxygen - no atmosphere to speak of, no carbohydrates, no liquid water, no Earth-equivalent gravity to keep our bones and muscles strong, no magnetic field to protect from cosmic rays, no molten core for warmth and geothermal energy. Let's not forget the planet-wide dust storms, made of superfine, abrasive dust, which can go on for months.

It would cost a tremendous amount of money to set up a viable colony there, orders of magnitude more than it would cost to send one single colony ship through the wormhole, in search of Earth-like planets.

Besides, if they wanted to put humanity under a dome, they could have just built one here on Earth.