In Conversation
What is deep time?
May 2005
Richard Alley explains deep time and how it tells the story of our planet in this multimedia feature. Scroll down for QuickTime movies.
Richard Alley, Evan Pugh professor of geosciences, led an expedition of students through 12 National Parks of the southwestern United States in May 2004.Photo by Anna Brendle
What is Deep Time? (2 min. 42 sec.)
Deep Time and Beliefs (1 min. 27 sec.)
Deep Time and Change (1 min. 33 sec.)
Deep Time and You, Part 1 (1 min. 15 sec.)
Deep Time and You, Part 2 (2 min. 15 sec.)
Richard Alley, Ph.D., is Evan Pugh professor of geosciences in the College of Earth and Mineral Sciences, rba6@psu.edu. The expedition was sponsored by CAUSE (Collaborative Active Undergraduate Student Experience), an annual course offered by the College of Earth and Mineral Sciences.