title: Mass extinctions.
abstract: Factors influencing the evolution of complex traits such as body size are notoriously difficult to study but a new review of work on marine iguanas in the Galapagos islands suggests an answer may lie in the interplay of natural and sexual selection.
authors.affiliation: Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK. sc113@esc.cam.ac.uk
authors.forename: Simon Conway
authors.initials: SC
authors.lastname: Morris
mesh_terms: D044822:Biodiversity; D004190:Disasters; D005843:Geography; D010163:Paleontology; D011157:Population Dynamics