domingo, janeiro 04, 2004

Coisinhas pequenas

Um artigo do Professor Joshua Lederberg(*), no EXPRESSO On-Line, com o título "Homens e micróbios".

(*) Prémio Nobel de Fisiologia e Medicina em 1958, pelos seus trabalhos sobre recombinação genética e organização do material genético das bactérias.
"In North America the black bear was seen by [Samuel] Hearne swimming for hours with widely open mouth, thus catching, like a whale, insects in the water. Even in so extreme a case as this, if the supply of insects were constant, and if better adapted competitors did not already exist in the country, I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits, with larger and larger mouths, till a creature was produced as monstrous as a whale."
Darwin, Charles; "The Origin of Species by Means of Natural Selection" (On the origin and transitions of organic beings with peculiar habits and structure)