Professor of Biology/Co-Director, Public Health Program
Biology / Academic
- IDEA Center 261
B.S., M.A., College of William and Mary
Ph.D., University of Wisconsin-Madison
The Donald MacGregor Chair in Natural Science
I do research in three main areas and incorporate this research into my classes. The first area is the relationship between evolution and human health, where I focus on exploring the mismatch between how our species evolved and lived for very long periods of time in contrast with how we are living today. One of the most dramatic areas of this mismatch is between the diet humans evolved to eat and the diets eaten by most people today. I teach courses exploring these topics, such as Evolution and Human Health, co-authored a related book, The Hunter-Gatherer Within: Health and The Natural Human Diet, and give public lectures emphasizing the importance of this mismatch for Public Health.
I also do research on, and have written articles and books on the plants of Texas and work in collaboration with colleagues at the Botanical Research Institute of Texas in Fort Worth.
My third area of research is on evolution in extreme environments including tropical rainforests, high mountain peaks, deserts, Antarctica, and the Arctic. In my research I have traveled to all seven continents and have taken students on JanTerm classes and research trips to fifteen different countries.
- Evolution and Human Health
- Earth, Body, and Mind
- Evolutionary Biology
- Life at the Edge: Extreme Evolution
- The relationship between how humans evolved & our health today
- The natural human diet & health
- The plants of Texas
- Evolution in extreme environments
- Communicating science
- Personal Webpage
- On-line lecture on plant food toxins from Ancestral Health Symposium 2014
- On-line lecture on More Consequences of Evolutionary Mismatch
- On-line webinar on diet and health at It’s Time Texas
- Podcast interview on teaching evolutionary health
Diggs, G. and B Lipscomb. 2014.
Brock, K. and G. Diggs. 2013.
|Diggs, G, B, Lipscomb, M. Reed, and R. O’Kennon. 2006.
Illustrated Flora of East Texas, Vol. 1
(Introduction, Ferns, Gymnosperms, Monocots).
Sida, Bot. Misc. 26.
Available online in pdf format.
|Diggs, G, B. Lipscomb, and R. O’Kennon. 1999.
Shinners and Mahler’s Illustrated Flora of North Central Texas.
Sida, Bot. Misc. 16.
Available online in pdf format.
Diggs, G.M., Jr. 2017. Evolutionary Mismatch: Implications Far Beyond Diet and Exercise. Journal of Evolution and Health 2(1), Article 3.
O’Kennon, R. and G. Diggs. 2011. Llavea cordifolia (Pteridaceae): New for Texas and the United States. Journal of the Botanical Research Institute of Texas 5:351–355.
Diggs, G.M., Jr. and R.J. O’Kennon. 2003. A rockhouse habitat in North Central Texas. Sida 20:1327–33.
Diggs, G. and P. Schulze. 2003. Soil-dependent fire frequency: A new hypothesis for the distribution of prairies and oak woodlands/savannas in North Central and East Texas. Sida 20:1139–1153.
Diggs, G. and B. Lipscomb. 2002. What is the writer of a flora to do: Evolutionary taxonomy or phylogenetic systematics? Sida 20:647–674.
Lipscomb, B. and G. Diggs, Jr. 1998. The use of animal-dispersed seeds and fruits in forensic botany. Sida 18:335–346.
Upcoming and Recent Lectures:
Texas Native Plants: What’s the Big Picture? Sherman Texas Earth Day Event, April 22, 2017
Native Plants and Climate Change, Collin County Chapter of the Native Plant Society of Texas, June 6, 2017
The “Natural” Human Diet: Surprises for Health and Weight Loss, Blakland Prairie Master Naturalists, August 19, 2017
Climate Change: Perspectives for Naturalists, Grayson County Master Naturalists, October 7, 2017.
Climate Change: Perspectives for Naturalists, Backland Prairie Master Naturalists, October 2016
Climate Change: Perspectives from the Global to Texas, Native Plant Society of Texas Annual Meeting, Glen Rose, TX, October 2016
Climate Change: Traps, Conservation, and Hope for the Future, Native Plant Society of Texas Annual Meeting, Glen Rose, TX, October 2016
Real Food Diets for Lions, Zebras, Humans, and Beyond, TEDX event, Austin College, September 22, 2016
More Consequences of Evolutionary Mismatch: Implications Far Beyond Diet and Exercise, Ancestral Health Symposium, Univ. of Colorado-Boulder, August 2016
Ferns of Texas: Some Interesting Connections, Southwestern Fern Society, Dallas, TX, June 2016
The “Natural” Human Diet: Surprises for Health and Weight Loss, Grayson College, Denison, TX, March 2016
Toxic Native Plants, Toxic Human Foods: The Evolutionary Connection, Native Plant Society of Texas Annual Meeting, Austin, TX, October 2015
To the Ends of the Earth: Life at the Polar Extremes, Austin College Biology Dept. Lecture, April 2015
I enjoy traveling, hiking, gardening, photography, and trying the world’s most unusual foods.