common ancestry

In March 2010, Douglas Theobald published a paper in Nature purporting to demonstrate “A formal test of the theory of universal common ancestry.” According to his cheering squad at National Geographic, the paper “supports the widely held ‘universal common ancestor’ theory first proposed by Charles Darwin more than 150 years ago.” National Geographic is mistaken on one obvious point: Darwin wasn’t the first to propose universal common ancestry. But never mind that. The paper makes no official claim to be a response to scientific skeptics of universal common ancestry, but given Theobald’s notoriety as the author of the widely criticized “Talk Origins Common Ancestry FAQ,” his motivation is clear. If there were no doubts about universal common ancestry (“UCA”), his Read More ›

In my previous post responding to the National Center for Science Education’s (NCSE) attacks on Explore Evolution‘s treatment of biogeography, I explained that there are many examples where there is inconsistency between evolutionary expectations of biogeography and plate tectonics. The NCSE is thus wrong to have claimed that “The consistency of these sorts of nested patterns cannot be explained without reference to common descent. The creationist ‘orchard’ is scientifically meaningless, since it makes no predictions.” * The classical “universal common descent” view is contrasted with the orchard model at below: The NCSE’s claim is perplexing because, as noted, the NCSE also claimed that “continuity [between biogeographic and evolutionary patterns] is what would be expected of a pattern of common descent, Read More ›