The recognition of Gregor Mendel's achievement in his study of hybridization was signalled by the ‘rediscovery’ papers of Hugo de Vries, Carl Correns and Erich Tschermak. The dates on which these papers were published are given in Table 1. The first of these—De Vries ‘Comptes rendus paper—was in French and made no mention of Mendel or his paper. The rest, led by De Vries’ Berichte paper, were in German and mentioned Mendel, giving the location of his paper. It has long been accepted that the first account of Mendel's work in English was given by the Cambridge zoologist, William Bateson, to an audience of Fellows of the Royal Horticultural Society in London on 8 May, 1900. This is based on two sources: the paper ‘Problems of Heredity as a Subject for Horticultural Investigation’, published in the Society's journal later that year and stated as ‘Read 8 May, 1900’, and Beatrice Bateson's account of the event over a quarter of a century later. Of the paper which her husband gave on that occasion she wrote:

He had already prepared this paper, but in the train on his way to town to deliver it, he read Mendel's actual paper on peas for the first time. As a lecturer he was always cautious, suggesting rather than affirming his own convictions. So ready was he however for the simple Mendelian law that he at once incorporated it into his lecture.

In his famous biography, Ernest Jones turns aside from his central theme at one point to relate a curious episode involving psychoanalysis and Hollywood, in the persons of Freud and the well-known film producer Samuel Goldwyn. Like many others in the film industry, Goldwyn was fascinated with the challenge of exploiting the association between psychoanalysis and sex on screen, but although he approached ‘the greatest love specialist in the world’ with an offer of $100 000 for his co-operation in making a movie, Freud declined and even refused to see him. To some degree, Freud's antagonism sprang from his distaste for America and its values, which he contemptuously dismissed as a blend of crude behaviourism, materialism and consumerism, epitomized in the figure of Goldwyn, whose reputation for vulgarity had preceded his arrival in Europe. But for the most part, he remained sceptical that the theories of psychoanalysis could ever be properly expressed on the silver screen, even when the attempt was made by two close acquaintances, Hanns Sachs and Karl Abraham.

When did modern science arise? This is a question which has received divergent answers. Some would say that it started in the High Middle Ages (1277), or that it began with th ‘via moderna’ of the fourteenth century. More widespread is the idea that the Italian Renaissance was also the re-birth of the sciences. In general, Copernicus is then singled out as the great revolutionary, and the ‘scientific revolution’ is said to have taken place during the period from Copernicus to Newton. Others would hold that the scientific revolution started in the seventeenth century and that it covered the period from Galileo to Newton. Sometimes a second scientific revolution is said to have occurred in the first quarter of the twentieth century (Planck, Einstein, Bohr, Heisenberg, etc.), a revolution which should be considered as great as the first one.