Footprints in Stone - Presented to OLLI Class, September 20, 2016

Trace Fossils - Presented to Prof. Ed Stehpenson's biology class, January 2016

Trace Fossils (extended) - Presented to SEAVP meeting, May 14, 2015

Footprints in Stone: the Wonder of Alabama's Coal-Age Trace Fossils - Presented to Birmingham Paleontological Society, March, 2016

Surface and Behavioral Trackways from Walker County, Alabama: Preservation and Implications - Presented to Alabama Paleontological Society, July 11, 2016

The Story Behind Footprints in Stone, the Coming to Fruition of a Pipe Dream - Presented to Alabama Paleontological Society, August 1, 2016

Galactic Resonances and the Shapes of Galaxies -Presented to Department of Physics and Astronomy, University of Alabama, April 6, 2016

Galactic Resonances and the Shapes of Galaxies -Presented to Department of Physics and Astronomy, Georgia Southern University, March 28, 2016

The Mystery of Paleozoic Clay Fossils - Presented to Alabama Paleontological Society, Birmingham, Alabama, February 4, 2014

Cosmic Catastrophes and Life on Earth - Presented to Alabama Paleontological Society, Birmingham, Alabama, 2009

Pattern Speed and Galaxy Morphology - presented at the University of Padova, Italy, summer 2008

Astronomy and the Coal Age of Alabama - presented to the Birmingham Astronomical Society and to the Peach State Star Gaze 2008

Rendezvous with Birr Castle: A Visit to the Heart of Early Irish Astronomy - Presented at Peach State Star Gaze, Deerlick Astronomy Village, 2008

Visual Astronomy from a Professional Astronomer's Perspective - Presented at Annual General Meeting of the Webb Deep-Sky Observer's Society, Institute of Astronomy, Cambridge University, December 2007

Quantification of Bar Strength and the Structure of Galaxies - Presented at Institute of Astronomy, Tenerife, Canary Islands June 2008

From the Age of Heroes: Gerard de Vaucouleurs and the Universe - Presented to Atlanta Astronomy Club meeting, probably 2006

Galaxy Classification in the 21st Century: The Story Behind the de Vaucouleurs Atlas of Galaxies - presented to the Birmingham Astronomical Society, 2006 or 2007

Documenting the Steven C. Minkin Paleozoic Footprint Site - presented at Geological Society of America Meeting, 2005 or 2006

Spiral Galaxies - presented to Birmingham Astronomical Society several years ago

Secular Evolution and the Morphology of Galaxies - presented at meeting in Ringberg Castle, Bavaria, Germany, in 2004

Gravitational Bar Torques in the Spiral/S0 Divide - presented at a meeting held in South Africa in 2004

The Corotation Resonance and the Morphology of Galaxies (by X. Zhang and R. Buta) - presented at the University of Oulu, Finland, 2003 or 2004

Pre-Dinosaur Footprints in Alabama: Traces of a Forgotten Past - presented to the Birmingham Paleontological Society, possibly in 2001

Pennsylvanian Footprints in the Black Warrior Basin of Alabama - presented at the Bernard Price Institute of Paleontological Research, University of the Witwatersrand, Johannesburg, South Africa between 2001 and 2003

Return to Homepage