However, new analysis of spacecraft observations in combination with novel laboratory techniques shows that Mars’s red colour is better matched by iron oxides containing water, known as ferrihydrite. Ferrihydrite typically forms quickly in the presence of cool water, and so must have formed when Mars still had water on its surface.

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[–] notfromhere@lemmy.ml 5 points 9 months ago (2 children)

My completely unfounded theory is Mars’ iron core was puked out all over the ground and the water rusted it away. That turned her red and lost her magnetosphere.

[–] jaybone@lemmy.world 3 points 9 months ago (1 children)

Puked out, like from volcanic eruptions?

[–] notfromhere@lemmy.ml 2 points 9 months ago

Yea. I have no idea if there is evidence of that or not. I never really studied Mars more than, “red planet.”