Nuclear DNA does not reconcile ‘rocks’ and ‘clocks’ in Neoaves: a comment on Ericson et al.

The discrepancy between fossil- and molecular-based age estimates for the diversification of modern birds has persisted despite increasingly large datasets on both sides ([Penny & Phillips 2004][1]). For the purpose of addressing this discrepancy, [Ericson et al. (2006)][2] recently generated a

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