The origins and evolution of the North American grassland biome: the story from the hoofed mammals

This article appears in the special issue "Reconstruction and Modeling of Grass-Dominated Ecosystems", the papers in this collection were presented at the first Paleo-Grassland Research workshop (PGR 2000), held in Westbrook, USA from 1-3 June 2000. The workshop was co-sponsored by PAGES.