I published that theory [of speciational evolution] in a 1954 paper...and I clearly related it to paleontology. Darwin argued that the fossil record is very incomplete because some species fossilize better than others... I noted that you are never going to find evidence of a small local populatlon that changed very rapidly in the fossil record... Gould was my course assistant at Harvard where I presented this theory again and again for three years. So he knew it thoroughly. So did Eldredge. In fact, in his 1971 paper Eldredge credited me with it. But that was lost over time.
Ernst MayrRelated topics
course evolution find fossil lost paper small three others years Harvard darwin gouldRelated quotes
Around 1958, I became aware of H. A. Simon's seminal papers on bounded rationality and was immediately convinced by his arguments. I tried to construct a theory of boundedly rational multigoal decision making. Together with Heinz Sauermann, I worked out an "aspiration adaptation theory of the firm" which was published as a journal article in 1962... More and more I came to the conclusion that purely speculative approaches like that of our paper of 1962 are of limited value. The structure of boundedly rational economic behavior cannot be invented in the armchair, it must be explored experimentally.
Reinhard Selten
But this (a listing of illustrations of how the genome can change other than by mutations) doesn't constitute a crisis-it's a very interesting finding that shows that variation in a genome can arise by processes other than mutation of an organism's own DNA. The disposition of that variation still must occur via either natural selection (it can be good or bad) or genetic drift (no effect on fitness). This hasn't really changed the theory of evolution one iota, though it's changed our view of where organisms can acquire new genes.
Jerry Coyne
I have learned from experience that it is useful to begin by drawing one's picture clearly on a virgin canvas, first having noted the desired effect on a white or gray paper, and then to do the picture section by section, as immediately finished as one can, so that when it has all been covered there is very little to retouch. I have noticed that whatever is finished at one sitting is fresher, better drawn, and profits more from many lucky accidents, while when one retouches this initial harmonious glow is lost. I think that this method is particularly good for foliage, which needs a good deal of freedom.
Jean-Baptiste-Camille Corot
The theory of the origin of new species by variation will also explain why a species which has once died out never reappears, and why the fossil fauna and flora recede farther and farther from the living type in proportion as we trace it back to remoter ages. It would also account for the fact, that when we have to intercalate a new set of fossiliferous strata between two groups previously known, the newly discovered fossils serve to fill up gaps between specific or generic types previously familiar to us, supplying often the missing links of the chain, which, if transmutation is accepted, must once have been continuous.
Charles Lyell
Brambles, in particular, protect and nourish young fruit trees, and on farms bramble clumps (blackberry or one of its related cultivars) can be used to exclude deer and cattle from newly set trees. As the trees (apple, quince, plum, citrus, fig) age, and the brambles are shaded out, hoofed animals come to eat fallen fruit, and the mature trees (7 plus years old) are sufficiently hardy to withstand browsing. Our forest ancestors may well have followed some such sequences for orchard evolution, assisted by indigenous birds and mammals.
Bill Mollison