Another Evolution Analogy

In a previous post I discussed (among other things) Richard Dawkins' "Climbing Mount Improbable," in which he laid out a good analogy comparing the gradual process of evolution to a walk up a very gradual slope that eventually leads to the top of a very high mountain.  It's a very good analogy, but I fear it may require a bit too much work to accept it since (a) not everybody has experience with climbing up gradual slopes and (b) a change in altitude is not really in the same conceptual ballpark as the change that species undergo over time.  It's strength is, I believe, primarily in the way it conveys how extremely small changes can add up to large changes over extreme lengths of time.  But some folks will probably still reject it because they simply can't get their minds wrapped around the comparison of time to distance.

After much thought, I believe I have come up with, if not a better analogy, at least a complimentary analogy to the one Professor Dawkins discussed.  It lacks the sense of vast time in Dawkins' analogy, but is more grounded in everyday experience and deals with actual biological processes.  It also helps deal with the common objection heard by Creationists that there are no "transitional" fossils that show one species evolving into a completely different species.

Let's imagine a father who photographs his newborn child and decides to take a new photograph of the child once every minute of every hour of every single day from that point on. At the end of the first day, the father has 1400 pictures, after one week he has 10,080 pictures, and at the end of a year he has a whopping 525,960 pictures. At the end of ten years, the stack has grown to 5,259,600 pictures, and by the time the child is 50 years old, the stack has grown to 26,298,000 pictures. And (assuming the father was extremely long-lived or passed the duties on to somebody else), by the time the child is 90 years old, the stack has a massive 47,336,400 pictures, all showing the gradual growth of a baby into an elderly man one minute at a time.

Now, over a period of ninety years, the child has changed from a newborn infant to an elderly man, and along the way the child progressed through various well-defined stages (infant, toddler, child, pre-teen, adolescent, young adult, adult, middle-age, senior citizen, elderly) . And if you randomly selected any example from that stack of 47,336,400 pictures, you would be able to clearly identify which stage of life the child was in at the time that photograph was taken. No photograph, however, would show a clear "transition" from one stage to the next. You wouldn't, for example, find a picture showing the child with the body of a baby and the head of a toddler. Or the arms of a teenager but the legs of an adult. Or (to mirror some of the extreme examples asked for by Young Earth Creationists), the body of an infant and the head of a senior citizen.

The point is that the change from infant to elder is so gradual that there are no clear-cut transitions from one stage of life to the next. Somebody may legally be considered an adult at the age of 18, but it would be impossible to detect any physiological differences between a person one minute or one hour or even day before his 18th birthday and one minute, hour or day after his 18th birthday. And this isn't to say that there aren't any transitional photographs of the child; instead, it means that every single photograph shows a transition from the previous minute to the next minute and the supposedly "well-defined" stages of life are really just shortcuts we use to describe people instead of actually having some sort of absolute definitions.

The same is generally true with regard to the fossil record and the evidence it provides for evolutionary processes.  Just as children gradually change into adults over time, species gradually change into other species over time.  The only difference is that species change over millions of years instead of 90 years, but the principal is the same.  Just as you will never find a photograph of somebody who has the head of an infant and the body of an adult, you will never find a fossil showing the head of one species and the body of a previous species.  And this isn't to say that there aren't any transitional fossils; instead, it means that every single fossil shows a transition from the prior generation to the following generation and the concept of "well-defined" species is really just a shortcut we use to describe life instead of actually having some sort of absolute definition.

Timing Is Everything

OK, so this has nothing to do with why I am atheist, but I just wanted to share...

For a couple of years now, I've been a semi-regular visit to Richard Dawkins's website at richarddawkins.net.  Partly for all the interesting articles there about science and religion, but mostly because the site allowed ordinary people to submit their own articles for discussion and engage in conversation with fellow atheists as well as the few brave theists who wanted to explain just how and why we were wrong about everything we believed (or didn't believe, as the case may be).

I personally found the discussions a great way to expand my scientific knowledge and had some great experiences posting some questions I had about things like biology and evolution.  It wasn't quite the same as sitting down for a discussion with Sir Richard himself, but still a very valuable and rewarding experience.  In addition, I enjoyed engaging in debates with a number of the aforementioned theists on a wide variety of topics.  In fact, many of the posts I make on this blog are based on those discussions.

Anyway, a few weeks ago, when I first thought of creating this blog, I decided to go through the discussion archives at richarddawkins.net and save some of the posts I had made there onto my hard drive.  I didn't really need to, I figured, since the archive would always be there, but it would just be easier to look things up on my own hard drive than having to keep running queries.

Well, as it turns out, timing really is everything.  As of a few days ago, the entire discussions forum has been completely removed.  And I do mean completely.  There are no links to it on the main page and any old links elsewhere return 404: Page Not Found errors.  The archived discussions are likewise completely gone as if they had never existed.

I sent an e-mail to support and eventually received the following response:

Discussions have been removed.  The time and personnel required to moderate them are simply not available to us at this time.  Given our current resources, we felt that focusing on high-quality reputable content was a more efficient use of those resources.

Thank you for your feedback and understanding.

Well, they are certainly welcome for my feedback, but not for my understanding.  Unpaid moderators don't typically require a great deal of resources, but that's not for me to decide.  What bothers me most, however, is the loss of all archived discussions.  You don't need any resources to moderate archived discussions, especially if you lock them so no additional posts can be made.  I suspect there was more going on here than simply a lack of moderation resources but, again, that's not for me to say.

What I can say, however, is that I doubt I will be spending much time at the site anymore.  I still support Richard Dawkins and the mission of his Foundation for Reason and Science, but the thing I valued most about his website -- the ability to ask questions of and engage with like minded people -- is now gone.

Just wanted to get that off my chest, especially since nobody else seems to be talking about it anywhere (not that I can find, at least).  We now return you to our regularly scheduled programming...