In reverse order:
5. Â David Sloan Wilson, pissing off the angry atheists.
"I piss off atheists more than any other category, and I am an atheist." This sparked some lively action in the comments.
4. Lively or not, Wilson and Dawkins lost fourth place to snail jokes.
A turtle gets mugged by a gang of snails. 
3. A walking tour that lets you See exactly where Phineas Gage lost his mind
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2. "Push" science journalism, or how diversity matters more than size
We're constantly told -- we writers are, anyway -- that people won't read long stories. They're hard to sell to editors,…