Justus' 2nd Thought: Heel-hooks and Natural Selection

I was out at the boulders today, helping a friend with a difficult heel-hook, when I remembered what Darwin had said about climbing:

It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change.

"That's it!" I thought. Open the hips to the spirit of change. Send!

PS. Spotting me in the picture is the ever attentive Bob Kellough!