Michael Shermer over at Scientific Blogging:
My explanation — that the chances of an ET turning out to be a bipedal primate are close to zero — is not one shared by all scientists. None other than the Oxford evolutionary biologist Richard Dawkins wrote to Josh Timonen, the videographer who filmed and produced this piece:
I would agree with him in betting against aliens being bipedal primates and I think the point is worth making, but I think he greatly overestimates the odds against. Simon Conway Morris, whose authority is not to be dismissed, thinks it positively likely that aliens would be, in effect, bipedal primates. Ed Wilson gave at least some time to the speculation that, if it had not been for the end-Cretaceous catastrophe, dinosaurs might have produced something like the attached.