His parable of the hats is rather brilliant:
My people are obsessed with hats. Almost everyone wears them, and a lot of their identity is wrapped up in their particular style... Individuals only rarely changed hat styles, and when they did, it was considered grounds for sorrow by those who wore the abandoned style, and cause for rejoicing by those wearing the newly adopted style. Sometimes people would invent new kinds of hats, which were typically regarded as bizarre when one person was wearing it, but once a sufficient number switched to the new style, they were respected automatically. It meant that streets of our more cosmopolitan cities were filled with strange and comical hats bobbing along, but no one laughed. Laughing at a hat was considered a heinous crime.
Sound familiar? Do read the whole thing. But my all time favourite Pharyngula post would have to be The proper reverence due those who have gone before, a deeply profound and insightful post which I cannot do justice to here -- though I will offer a brief excerpt nonetheless:
I can feel something of the same reverence for the Bible that I do for a piece of bone. It's a record, spotty and incomplete and flawed, of human lives, that leaves out far more than it includes. It's not as pretty as a bone, but then it is representative of some of the ugliness of human history, as well as of some of the poetry. I can appreciate it as a slice of a few thousand years of the events and beliefs of one fairly influential tribe of people. There are a lot of lives and time, mostly unmentioned, bound up in that book.
P.Z. was also responsible for that gem about the "PYGMIES + DWARFS" I mentioned the other day. But although I most enjoy his godless posts, P.Z. is probably more famous for his science posts. He's been known to write about all sorts of bizarre life forms, including insects, denizens of the ocean's depths, and even Republicans (though he doesn't seem to like them so much as the other creepy crawlies). You can learn all sorts of neat things, such as how octopus suckers work. A bunch of his best science posts from last year have been highlighted by Darksyde, here. Enjoy!