The composition is not nearly as great as Earth so why try to live there? MEGA - Make Earth Great Again.
“MARS AND EARTH MAY NOT HAVE BEEN EARLY NEIGHBORS”
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True - Mars lived across town, next to the old mill.
I think Mars is what is left of the collision between a planet and a large rock where the asteroid belt currently is.
I never liked Mars, to be honest.
And then there is this kicker: every solar system surveyed that has planets, the large massive planets (like Jupiter, Saturn, Uranus, Neptune) are all located close to the star, in what would be the ‘habitable’ zone or just outside of it. So far it looks like our system is an exception to the rule.
The answer may lie in looking more closely at outlying theories like the the Electric Universe theory which does explain some of what is other wise not explained.