1) Considering how many planets we have looked at and that we can't find life on any of them this makes Earth very extraordinary.
The only reason we are able to detect life on Earth is due to proximity - so you're just as guilty of jumping to conclusions as the GP. We've found planets that differ wildly from Earth because the easiest planets to detect are the fuck-all-huge ones. Just because we haven't observed Earth-like planets yet does not mean they aren't all over the bloody place. They're just rather hard to spot with current technologies.
the Interweb is full of lies and damned lies.
So is the Library. I don't see why I should put any more faith in the written words of an anonymous stranger simply because it is on paper rather than on my screen. Books can be (and often are) just as biased or distorted as anything found on the 'Interweb'.
Genetics explains why you look like your father, and if you don't, why you should.