Leonardo DaVinci conceived, but never finished, the world's largest equine statue. This project failure has puzzled scholars ever since. Kasey-Dee Gardner finds out why this project came to a grinding halt.
Did Leonardo DaVinci use his own shadow to create the outline of Jesus in The Last Supper? James Williams speaks with a researcher who has found evidence in Leonardo's manuscripts suggesting that's the case.
Can you talk your way out of a bear attack? Animal expert Dr. Thomas Smith recalls one successful example. [Note: Bears used in the making of this program, filmed at the Alaska Wildlife Conservation Center, are not free-ranging bears.]