Ancient Engineering

This follows a trail of energy into the power centers of the universe.

In the shadows of the Smoky Mountains lives a football dynasty. Alcoa High School is southern Appalachia's true football powerhouse.

With personal interviews, Legends of Speed not only describes dramatic happenings on the race tracks, but also puts a spotlight on the fears, and the courage of the drivers and their relatives. All of them deal differently with the extreme sport of "Formula One" racing, but they all have one thing in common and that is the will to win.

How, from bizarre ancient markings to random numbers and letters, codes and ciphers have been used for millennia to send secret messages, hide identities.

Big cat populations are shrinking fast, but now we have the means to view them in more detail than ever.