Alien life, if it exists at, all is likely to be just like us, a leading scientist has claimed.This seems more or less plausible, given how convergent evolution tends to produce remarkably similar looking species to occupy similar ecological niches in completely different parts of the world it seems logical that the same principle would apply to other planets. What I don't understand is the "leading scientist's" next statement:
However he also thinks that because much of the Universe is older than us they would have evolved further down the line and we should have heard from them by now.
He believes it is increasingly looking like they may not be out there at all.
"It is about time they turned up," he said. "It is very, very quiet out there. Suspiciously quiet. Where on Earth are they? I personally don't think that there is anything out there."
If they look like us, how does he know that they aren't already here?