So many solar systems out there, life evolved in many planets for sure. No proof but no doubt.
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Sure, maybe that’s a requirement for the type of life we on earth know about, but I don’t see why other elements couldn’t have also formed in just the right way to be able to reproduce, and maybe eventually “think”.
Looking at other forms of chemistry we don't see much as naturally varying as carbon. Though I have heard some chemists and biologists hypothesize about sikicon based life. At high temperatures it forms the kinds of dynamic connections that carbon does.