What I did this weekend
Actually, not much, although I suppose I could regale you with the story of how I daringly wrote a couple of paragraphs on the stratigraphic chronology of Kom el-Hisn. Didn’t watch much of the Stupor Bowl, although I liked the outcome. My interest in football starts to wane after the Rose Bowl, although I still see the SB as the formal end of the football season.
I did, however, start reading through the papers in the Science magazine on Ardipithecus Ramidus. Two things have struck me so far. First, they all use ‘hominid’ instead of ‘hominin’ for which I am thankful. Second, they repeat the argument in several of the papers and summaries that this weakens the argument or at least the general feeling that the most recent common ancestor of us and the great apes looked a lot like chimpanzees. That has bothered me for some time, especially when modern chimp behavior is used as an analog for early hominid behavior. I do recall being taught in undergrad school, lo these many years ago, that many chimp and gorilla features, such as knuckle walking, may be recent adaptations specifically by those lines and that we did not necessarily evolve from very similar common ancestors. It assumes that the chimp line was largely static since the split. I’ve kind of harped on this sort of thing before in the context of archaeology, where many use modern hunter gatherers as analogs for our ancestors. There’s a lot of arguments for and against ethnographic analogy, but one doesn’t really expect to see something like it in one of the more biological sciences.
They haven’t yet gone into the defining characteristics of ‘hominids’ but I have only read the author summaries and part of the first paper. They have great stratigraphy though. The fossil-bearing layer is neatly sandwiched between two tightly dated volcanic deposits that suggests that the entire deposit formed within a few thousand years making for a great slice of time.
I just checked the Science web site and it looks like they are offering some of the articles for free (with a registration), so go have a look, if interested.
