Internationally acclaimed conservationist Dr. Mike Fay.

Dean Kamen has over one hundred U.S. patents on his inventions, including a wheelchair that climbs stairs.

Archaeologist Zahi Hawass controls access to the Great Pyramids and other Egyptian sites.

Renowned climber and inventor Hugh Herr leads the technical revolution in prosthetics.

Rivas must decide between exploration and science.

Wife of the Prince of Nepal, Latika Rana is a tiger conservationist.

Reza uses his camera to show the true victims of war.

Wildlife filmmakers Mark Deeble and Vicky Stone.

Arctic photographer Adam Ravetch travels to Canada to film a polar bear attacking a walrus.

British photographer Karen Davies travels to Pakistan to photograph Gen. Pervez Musharraf.