Daily Archives: 31/10/2014

Evolutionary trajectory

A particularly zealous reader may recall that in my recent piece on the fossil record I raised a question, in passing: “…as an exercise, can you say what in Neodarwinian theory precludes a cyclical, rather than linear and branching, evolutionary process?” Despite claims like Koonin’s (2009) that there is no tendency to greater complexity in evolution, the most basic finding of palaeontology is the overall trajectory from simple (if that word means anything in biology) single celled organisms to, well, humans, or at least higher life-forms. Whether one calls it progress or not, what is undeniable is that it is a trajectory, or rather a branching series of trajectories, which … Continue reading

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