Jeffrey H. Schwartz

"If Walter Garstang's suggestion is correct, and chordates did arise from a tunicate-like form by retaining the chordate features of their larval stage of development into adulthood, then the first cho…"

"There are always alternative interpretations of the same data. It is often the case, however, that the alternatives that are rejected are treated as if they don't exist. But they do. And we should be …"

"Petrie found that certain types of pottery were characteristic of a particular phase of the Bronze Age, whereas other styles were found only a phase of the Iron Age, or only during the Hellenistic or …"

"The upper and lower ends of a humerus are like the brim and base of an urn. The shaft of the bone is like the belly of the urn. Fragments, even minute ones, of the detailed parts of a bone are like th…"

"A "new" systematics will be forthcoming only when the urge to be "right" takes a back seat to the possibility that one is wrong."

"A micromutation can produce what Goldschmidt would have described as macromutation leading to macroevolution. Since mutations in homeobox genes are inherited in the same way that earlier fruit-fly pop…"

"The observation of reduction in complexity in many groups or organisms after a structure has emerged in a full-blown state makes sense in terms of homeobox genes."

"Jeffrey H. Schwartz, Professor University of Pittsburgh Departments of Anthropology and History and Philosophy of Science"