The evolutionist Ernst Mayr considered August Weismann “one of the great biologists of all time.” Yet the man who formulated the germ plasm theory—that inheritance is transmitted solely through the nuclei of the egg and sperm cells—has not received an in-depth historical examination. August Weismann reintroduces readers to a towering figure in the life sciences. In this first full-length biography, Frederick Churchill situates Weismann in the swirling intellectual currents of his ...

The evolutionist Ernst Mayr considered August Weismann “one of the great biologists of all time.” Yet the man who formulated the germ plasm theory—that inheritance is transmitted solely through the nuclei of the egg and sperm cells—has not received an in-depth historical examination. August Weismann reintroduces readers to a towering figure in the life sciences. In this first full-length biography, Frederick Churchill situates Weismann in the swirling intellectual currents of his ...

In "On Germinal Selection as a Source of Definite Variation," August Weismann presents a groundbreaking exploration of evolutionary theory that challenges conventional notions of heredity and adaptation. Through rigorous analysis and eloquent prose, Weismann posits that germinal selection'Äîselection occurring at the level of the germ cells'Äîplays a critical role in generating variation within species. His literary style is marked by clarity and precision, reflecting a meticulous scientif...

In "The Effect of External Influences upon Development," August Weismann presents a groundbreaking exploration of the interplay between environmental factors and biological development. Through a meticulous examination of various species, Weismann employs a scientific yet accessible literary style that bridges both natural history and biology, reflective of the dynamic intellectual debates of the late 19th century. He challenges the predominant Lamarckian views of inheritance by arguing fo...

Some years ago, when I imparted to a lepidopterist my intention of investigating the origin of this enigmatical dimorphism, in the hope of profiting for my inquiry from his large experience, I received the half-provoking reply: “But there is nothing to investigate: it is simply the specific character of this insect to appear in two forms; these two forms alternate with each other in regular succession according to a fixed law of Nature, and with this we must be satisfied.” From his point o...

Every one knows in a general way what is meant by the doctrine of descent—that it is the theory which maintains that the forms of life, animals and plants, which we see on our earth to-day, have not been the same from all time, but have been developed, by a process of transformation, from others of an earlier age, and are in fact descended from ancestors specifically different. According to this doctrine of descent, the whole diversity of animals and plants owes its origin to a transformat...

In "Essays Upon Heredity and Kindred Biological Problems," August Weismann embarks on a thorough exploration of the principles governing heredity, laying foundational concepts that later shaped genetics. Written in a clear yet profound literary style characteristic of the late 19th century, Weismann's essays dissect notions of inheritance by challenging established Lamarckian theories. The book's pivotal themes include the distinction between germ plasm and somatic cells, which elucidates ...

In "The Effect of External Influences upon Development," August Weismann presents a groundbreaking exploration of the interplay between environmental factors and biological evolution. Written in a rigorous yet accessible style, Weismann intricately examines how external stimuli shape the developmental pathways of organisms, offering insights that challenge the then-conventional Lamarckian views of inheritance. This work is seminal in its synthetic approach, bridging the fields of biology, ...

Perspectives on Genetics: A Comprehensive Collection of 6 Books offers a remarkable journey through time, showcasing a wide-ranging anthology that captures the iterative and evolving narrative of genetic science through a diverse array of literary styles. From groundbreaking theories to thought-provoking essays, this collection illuminates the trajectory of genetic understanding. With contributions spanning from the dawn of the 20th century to contemporary discourse, it contextualizes gene...

Vorliegende Arbeit untersucht den wissenschaftlichen Disput zwischen dem britischen Philosophen Herbert Spencer und dem Freiburger Zoologen August Weismann über die Vererbung individuell erworbener Eigenschaften, der in den 1890er Jahren geführt wurde. Vorangestellt ist ein historischer Abriss zu dieser Fragestellung sowie die Theorien der beiden Disputanden, der Keimplasmatheorie August Weismanns und des primär soziokulturell orientierten Evolutionskonzeptes Herbert Spencers, das im Diktu...

Die Bibel als akustisches KaleidoskopDie Bibel ist voller Geschichten von Wundern, Helden und Widersprüchen, die seit jeher zur künstlerischen Auseinandersetzung eingeladen haben. In diesem großangelegten Projekt des Hessischen Rundfunks erzählen Schriftsteller und Künstler die biblischen Geschichten aus einer gegenwärtigen Perspektive. Sie lassen einen Philologenkongress mit einem Pfingstwunder platzen, schicken Abraham mit seinen beiden Frauen Sarah und Hagar zum ...