Related Experiment Video
Updated: May 9, 2026

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras
Published on: May 31, 2014
A strange horn between Paolo Mantegazza and Charles Darwin
Carla Garbarino1, Paolo Mazzarello
1University of Pavia, Italy. mariacarla.garbarino@unipv.it
Abstract:
During the preparation of an exhibition in Pavia dedicated to the centennial anniversary of the death of the Italian Pathologist Paolo Mantegazza, a strange cheratinic horn was found at the Museum for the History of the University of Pavia labelled as 'spur of a cock transplanted into an ear of a cow.' After some historical investigation, we found this strange object was at the centre of a scientific correspondence between Mantegazza and Charles Darwin, who made reference to it in his book The Variation of Animals and Plants under Domestication.
Related Concept Videos
Convergent Evolution
The Fossil Record
Evolutionary Psychology
Synteny and Evolution
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
The Evidence for Evolution
Facial Feedback Hypothesis

