PHE’s Mark Stoeckle and colleague David Thaler published a new research paper in PLOS ONE, DNA Barcoding Works in Practice but Not in (Neutral) Theory. The paper examines what DNA barcoding can tell us about how evolution works. The authors argue for a radically different view of evolution to account for the widespread pattern of limited variation within species and larger differences among them, a feature that underlies the general effectiveness of DNA barcoding.