Could it be that our planet isn't typical at all? If so, then maybe life isn't typical either. On the other hand, if there are plenty of planets similar to Earth, we can reasonably hope for lots of cosmic company.
It wasn't something he expected to happen on such a dreary drizzly day, but he did, in fact, come to understand the meaning of life. And it wasn't one of those drunken enlightenments. No, this was the real thing.