"This course is an informative step in preserving cave ecology. One of the best teachers I've ever had."
"It helped me to understand the caves better. The instructor had a lot of insight not only about caves, but the people involved in exploring and studying the caves. Discussions were very thought-provoking in terms of applying what was taught and shown in the caves we visited."

Students examine a sinkhole near Mammoth Cave. |
"(Roger) explained things so that everyone could understand; not just the scientist. He is personable, funny, and a great explorer."
"I especially enjoyed the discussion of the formation of the cave, the biology, and the caving. Roger is a great guy. Not only is he a great explorer, but he is also a wonderful storyteller. I really loved hearing the stories of the discoveries and Flint Ridge caves."
"Great info on development of karst & caves. Great sense of humor. Generally would recommend to more experienced cavers."
"Instructor was extremely knowledgeable. Roger is one of those really brilliant people that you don't often meet."
"Outstanding instructor. Always adds personal experiences to enrich the material. Concerned about each individual."
"This was a great week, a unique experience."

Roger explains how mirabilite, a mineral, forms in caves. |
"Roger is a great instructor and a lot of fun."
"Lots of info, lots of caving. Got to see parts of Flint Ridge most people only get to read about. (Roger's) colorful presentation of the material brought it to life and helped it to 'sink in.'"
"The opportunity to occasionally do something extra based on group strength & camaraderie. The challenge, the feel and satisfaction of moving in the footsteps of explorers. Instructor's vast store of knowledge and anecdotes take this from being a mere course to the wonderful immersion experience it is. He gives confidence to students."