“The once rather old-fashioned science of paleontology finds itself in a maelstrom of excitement and controversy. Astrophysicists, atmospheric scientists, geochemists, geophysicists, and statisticians are all contributing to the extinction problem. And the general public is taking part through television talk shows, magazine cover stories, newspaper editorials, and even the occasional mention in gossip columns.” StoriesShowsProblemTelevisionScientistNewspapersMagazinesExcitementGossipOld FashionedControversyExtinctionOccasionalColumnsContributingEditorialsTalk ShowsGeneral PublicStatisticianPaleontologyMagazine CoversMaelstrom Author:David M. Raup
“In the beginning, there were bacteria.... [A] nearly universal assumption is that all subsequent life descended from the original life form through a continuous chain of ancestor-descendant pairs. This assumption looks good because all living organisms share biochemical traits. It is conceivable, of course, that life originated more than once on the early earth but that all except one life form died out early, leaving a single lineage as the ancestor of life as we know it. If this did happen, it was the first important species extinction.” IfsKnowsFirstsLooksImportantHappensEarthFormCoursesShareUniversalDiedOriginalsSpeciesLeavingChainsAssumptionPairsAncestorTraitsOrganismsExtinctionDescendantsBacteriaLineageLiving OrganismsSpecies Extinction Author:David M. Raup
