Birds and dinosaurs have oval eggs and big eyes. Does this necessarily mean they evolved from a common ancestor?
Hopeful ovals: Intent on evolving sparrows out of T. rex kin, some paleontologists are selectively basing arguments for common ancestry on similarities that do not seem all that impressive. For instance, a report on PhysOrg allowed researchers from Barcelona to claim common ancestry based on oval egg shape. “Researchers from Spain identified in Lleida a series of dinosaur eggs with a unique characteristic: They are oval in shape,” the subtitle announced. “The discovery represents proof in favor of the hypothesis that birds and non avian theropods, dinosaurs from the Cretaceous Period, could have a common ancestor.” The reporter later downgraded from proof to the milder phrase that it “suggests a connection with bird eggs.” If such a shape had been found in an unrelated animal group’s eggs, Darwinists would have undoubtedly attributed it to “convergent evolution.”
Peter Pan evolution: Nature on July 12 declared that “Birds have paedomorphic dinosaur skulls” (paedomorphic referring to “retaining a morphology as adults that resembles that of the juveniles or embryos of most other archosaurs”). The team of Bullar et al. (Nature 487, 12 July 2012, pp. 223–226, doi:10.1038/nature11146) performed detailed measurements of skulls of birds and theropods, and hypothesized that bird skulls represent a stage of arrested development of dinosaur skulls. Are they implying that a dinosaur didn’t finish maturing, and became a bird instead? Apparently so, and don’t think for a minute that we humans are exempt from this kind of hypothesis. They added, “Heterochrony—change in the timing or rate of developmental events—has been implicated in the evolution of major vertebrate lineages such as mammals, including humans.”
They didn’t even try to hide their evolutionary dogmatism. The first sentence begins, “Birds are living theropod dinosaurs”. Yet they recognized the uniqueness of birds, too: “The unique bird skull houses two highly specialized systems: the sophisticated visual and neuromuscular coordination system allows flight coordination and exploitation of diverse visual landscapes, and the astonishing variations of the beak enable a wide range of avian lifestyles.” Still, they stuck to their story that “the heterochronic process of paedomorphosis, by which descendants resemble the juveniles of their ancestors, is responsible for several major evolutionary transitions in the origin of birds,” counting at least four episodes of arrested development (except for bird beaks, which advanced beyond dinosaur developmental stages)…..
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