title: Ageing: levelling of the grim reaper.
abstract: Recent observations of a levelling of the death rate in extreme old age, in both experimental species and humans, are posing difficult problems for evolutionary biologists, in particular about the evolution of the post-reproductive period.
authors.affiliation: Department of Ecology and Evolution, University of Chicago, Chicago, lllinois 60637, USA.
authors.forename: B
authors.initials: B
authors.lastname: Charlesworth
authors.forename: L
authors.initials: L
authors.lastname: Partridge
mesh_terms: D000375:Aging; D000818:Animals; D019143:Evolution, Molecular; D018740:Genetic Heterogeneity; D006801:Humans; D008954:Models, Biological; D009026:Mortality