National Geographic Explorer and oceanographer Robert Ballard makes a case for serious exploration and mapping. Video is 18 min. long and recorded in February 2008 in Monterey, California. Dr. Ballard has been criticized on a few points (like favoring archeology over biology, *sniff*), but overall, outside the Titanic, this is what he’s famous for… an energetic and inspiring talk with several good points and facts.
Hat tip to Michael Barton, FCD for the link.