Word: evolutionism
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At well-attended rallies around the country, Keyes dissects the meaning of the Declaration of Independence and finds in it an antiabortion message. "We are endowed by our Cre-a-tor," he says, stringing out the syllables for effect, "not by evolution or by bureaucrats, with certain unalienable rights." Unalienable...
It is one of the fundamental mysteries of human evolution. When did the first apelike creatures begin to walk upright? Scientists believe this transformation probably occurred between 4 million and 6 million years ago, but until recently they had no fossils to back up their hypothesis. In 1994 researchers reported...
The new discovery, which Leakey and Walker have named Australopithecus anamensis (anam is the Turkana word for lake), is yet another reason why paleontologists are reconsidering some of their ideas about why the earliest humans stood up. According to one theory, as a change in climate transformed Africa's moist...
That something extra, Duboule and his colleagues suggest in the journal Nature, is provided by a special set of genes that act as master architects in a surprisingly broad range of animals, from rodents to roundworms. These gossamer strands of DNA -- known as homoeotic homeobox genes, or Hox genes for...
Further studies are needed to convince scientists that Duboule and his colleagues have correctly solved the fins-to-feet riddle. Other factors could be involved as well, including homeobox genes that are not Hox genes (that is, they do not affect the overall structure of an animal). Last year Sean...