Life, Yes; Intelligence, NoMicrobes are probably common. There could be microbes under the ice on Europa, if there are hot springs down there. Ditto with a small moon of Saturn's that has geysers. Microbes could well be a natural consequence of the facts of organic chemistry, and the ubiquity of carbon, nitrogen, oxygen, and phosphorus.
Multicellular life is a much bigger ask.
Humans are much more than the above. We speak languages. We think abstractly. We invented math, science, and technology. We know how to make other species do our bidding, i.e., we domesticate them. These capabilities could be exceedingly rare, and possible only because our earthly home is unusually benign.
Hence while microbes may be ubiquitous in our universe, we humans could be unique in the Milky Way.
deleted 26-30 2 Responses 0 Oct 17, 2011