amniotes
Evolution of the Penis
Evolution of the Penis
Kerry Grens | Oct 30, 2015
A phallus-less reptile goes through a developmental stage with external genitalia, suggesting a common origin for the organ among amniotes.
Aural History
Aural History
Geoffrey A. Manley | Sep 1, 2015
The form and function of the ears of modern land vertebrates cannot be understood without knowing how they evolved.