Professor: Karin Block
The Smithsonianmag.com article on James Hutton 1726-1797 (Father of Modern Geology) certainly drew my interest in the subject: "The genealogy of these ideas ... goes from Hutton to Playfair to Lyell to Darwin."
Then Catastrophism vs. Uniformitarianism (Hutton's view) is introduced.
This is also interestingly referred by Answers in Genesis. There seems to be a well documented history of the views on Earth's age. For example, Gap Theory was introduced not by Vos (as I had previously thought from reading Vos' commentary), but by someone earlier, Thomas Chalmers (1780–1847).
The professor did refute young-earth creationists view (Earth is not 6000 years old).
I supposed the most important challenge is the glossary.
Definitions Training is for this class is now available on Memrise.