I disagree; I think it's likely that there are billions of species of beings who resemble humans to some degree and who we would recognize as intelligent. The vastness of the universe makes this almost a necessity IMO.

We have two eyes because that's the minimum number needed for depth perception; certainly a highly desirable trait regardless which planet you evolved on. A nose is also extremely valuable for sensing danger. And all animals here on Earth have some sort of a mouth; for creatures that don't absorb nutrients through roots or something similar, or directly through their cell walls, it's pretty much a necessity.

In other words, the basic physiological structures that are common to most animals here on earth evolved for a reason. For other species that evolved elsewhere, there will almost certainly be enough environmental conditions that are sufficiently similar to our own that they will evolve similar structures.

That's not to say that there may not be a lot of planets with intelligent creatures that somewhat resemble our insects, or even plants - or they may be so bizarre that we have nothing to compare them to. But there will also be a whole bunch with species that are no more different from us than, say, an octopus or a bat, and probably many species that resemble sci-fi aliens, and I think it's likely that there are some species, somewhere, who look no more different from one race of humans than does another.

And I think that, in a lot of cases, we wouldn't be able to pass their SAT's.

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