Caves and controversy

A new book chronicles the beauty and mystery of Minnesota caves, as well as the political struggle over ownership and exploration of the geological wonders.

Guests

• Cary Griffith: Journalist and author of "Opening Goliath."
• Calvin Alexander: Professor in the department of geology and geophysics at the University of Minnesota.
• Warren Netherton: Cave manager at Forestville Mystery Caves, Minnesota Department of Natural Resources.

More from MPR

• Geologist shines light on Twin Cities caves
  April 15, 2009
• Ancient cave rocks reveal impact of climate change
  December 15, 2008

Resources

• Images of Goliath
• Mystery Caves
• About Calvin Alexander
• Minnesota Speleological Survey
• National Speleological Society