Juan Ponce de Leon

Lucas Cranach the Elder / This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1923.

Airs Thursday, August 25, at 7:45 a.m. Commentator Dr. Cheryl White travels into history In Search of the Fountain Of Youth.

Press Image / LSU Shreveport

Commentator Gary Joiner explores the Gulf Stream -- a powerful natural occurrence that changed the course of history and still drives economies today.