alt Hacker NewsCitizenship means having political rights. If it's decided at some point that a martian may have political rights...then yes, as it stands, their offspring would have citizenship upon birth/ejection/hatching/transmogrification or whatever means of reproduction they use.
This is really no different than if we decided that a dolphin or a naked mole rat are able to hold political rights. If an understanding that this is possible emerges, then as a logical consequence any dolphin or naked mole rat born in US jurisdiction would be a citizen.
You are surely oversimplifying it. The amendment clearly says "born or naturalized"; can hatching or transmogrification be considered a birth? We need to look at the original meaning of the word "born" in 1868.
Also, it does not say anything about having political rights, just about being a "person", which will surely start a separate debate :)