natural selection

According to a recent online report from Wired Science, “On one of the Galápagos islands whose finches shaped the theories of a young Charles Darwin, biologists have witnessed that elusive moment when a single species splits in two.” If it were true, this would be very important news. Evolutionary biologists have long recognized that Charles Darwin (despite the title of his most famous book) failed to solve what he called “the mystery of mysteries,” — the origin of species. Darwin argued that it happens by natural selection acting on small variations, but no one has ever observed the origin of a new species (“speciation”) by this process. Evolutionary biologist Keith Stewart Thomson wrote in 1997 that “a matter of unfinished Read More ›

“Go to hell!” said Ron Numbers cheerfully to me, as we greeted each other at the front of Rockefeller Chapel last night. “Hey, did I say that loud enough?” he asked, looking around at the various evolutionary biology and history and philosophy of science worthies — Lewontin, Kitcher, Sober, Ruse, Dennett, Richards, and so on — milling about. Ron’s smiling insult was a mocking attempt to redress the widespread criticism that he had let me off easy in our notorious Bloggingheads conversation. A spirit of raillery was in the air, given a vigorous kick at the beginning of the evening by Harvard geneticist Richard Lewontin. Little of the secular sanctimony of the 1959 Darwin centennial (see below) was in evidence. Read More ›