I use fossil
plants to investigate ancient ecosystems, past environmental change, and the evolution and extinction of plants and plant-insect associations. I
emphasize questions with relevance for modern
climate change, biodiversity, biogeography, and ecological processes.
Principal field areas include Patagonia, Argentina, and the
Western Interior USA.
Please browse the links below for more information.
The Cuticle Database (launched May 2012!)
Paleobotany Lab members present and past (Flash gallery)
Publications (with downloads and supplemental data/images)
News stories and commentaries
Rebecca Horwitt, Paleo-Illustrations of PW and colleagues' work (Flash gallery)
Climate Change and Biodiversity: Paradise Lost or Found?
for the 2011 NAS Kavli German-American Frontiers of Science Symposium, Irvine, CA
Fossil Rainforests of Patagonia: Ancient Biodiversity and Living Legacy
public lecture for the Spring 2010 Research Unplugged series, Research Penn State
Do Leaf-Eating Insects Respond to Environmental Change? Insights from Fossils
for the Fall 2009 Earth Talks series at Penn State
Penn State Geosciences
Music Unit- with audio files)