Sexual Selection

Lessons from the ‘replication crisis’ in science:

Simulated data show that modern statistical approaches, rather than ‘significance testing’, are more reliable when searching for sexual dimorphism in the fossil record. Dinosaurs show many lines of evidence for sexual variation.

Study: Biological Journal of the Linnean Society (Invited Review)

Media: Discover Magazine

Presentation: Palaeontological Association

Stegosaur plate variation likely correlates with sex:

Hesperosaurus (=Stegosaurus) mjosi plates show variation between wide and narrow varieties that cannot be solely explained by factors such as growth/development, ‘hidden’ species, or head-to-tail variation and is, therefore, most consistent with sexual dimorphism.

Study: PLoS One

Media: BBC, The Guardian, Los Angeles Times, Popular Science, The Economist, International Business Times, Live Science, Der Spiegel (German), PBS Eons

Presentation: Palaeontological Association

Hypothetical sexual dimorphism in Centrosaurus (Artwork by James Ormiston)