I don&#x27;t know where this myth comes from that scientists have some sort of strong belief that no other form of life is possible, but it&#x27;s not true. What we have is a lot of ignorance, so many scientists will often concentrate only on those <i>forms</i> of life (plural) we know exist because we share a planet with them, because those are the forms of life we can actually discuss with confidence, but I doubt you can find a serious scientist who will confidently proclaim no alternatives are possible.<p>There are good reasons to believe that ours is quite likely and good reason to be <i>skeptical</i> of alternatives, in the proper scientific sense, but certainly not <i>disproved</i> or something.