As an aspiring astrophysicist, I know a thing or two about space. I also know that space is super cool and almost everyone I've ever talked to wants to learn more about it. This is a technique of studying I do with friends and family, as by teaching something that I know, if better cements that concept into my brain.
Fair warning: I don't know everything, and I will let you know if what you're asking is out of my grasp. But I'm pretty good, so fire away.
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Do you think life existed in Mars at some point? It has plenty of frozen water, however most in canyons and cannot get any sunlight, or completely underground. I think that Mars use to have a much larger atmosphere. In the summer, it reaches 90 degrees Fahrenheit. With greenhouse gasses, this could theoretically reach Earth-like temperatures.