Hominid vs. Hominin
This is a minor pet peeve of mine, but I think it's worth mentioning, especially since we love being on top of our scientific game around here.
In the book and the blog, I see lots of references to "our hominid ancestors." While this is not exactly incorrect, the definition of the word hominid has changed in recent years to refer to all of the Great Apes and their ancestors. The term used to describe, specifically, the direct ancestors of Homo sapiens is hominin. So, to say that ancient hominids were cracking open skulls and eating the brains of animals isn't entirely true, since, to our knowledge, only the ancestors of humans ever did that.