4th and Forever: Alcoa

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

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.

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

How will humans take the next step into outer space - traveling to Mars not to visit, but to stay?

Presenter Alie Ward takes us on a wild, twisting journey through human history, connecting seemingly unrelated events, objects and people to the most intriguing phenomena of the modern world. Tracing these connections reveals deep insight into the nature of change and points a finger to the future of our species.

"Eat Me (or Try Not To)" is a six-part series that explores how global iconic food brands shape our world and where we're headed.