Extras
See how secret letters written by Mary, Queen of Scots, were finally decoded.
An unprecedented discovery could reveal new information about Cleopatra鈥檚 reign.
Discover how two revolutionary ancient inventions changed the course of humanity forever.
Learn about Marlee Matlin, Oscar-winning actress and champion of the Deaf community.
Marlee Matlin visits the house she grew up in Morton Grove, Illinois.
Marlee Matlin refused to allow a hearing actor to play her Deaf husband in the 2021 film 鈥淐ODA.鈥�
Henry Winkler took Marlee Matlin in for two years while she recovered from a turbulent time.
A new generation of lions, cheetahs, and leopards comes of age in Botswana鈥檚 Okavango Delta.
The first gladiator bones ever found reveal a small but unmistakable detail about how they lived.
Latest Episodes
Learn about the changes to the national parks during the Great Depression and WWII.
Examine the proliferation of protected lands and the protection of predatory animals.
Learn about the federal agency created to protect the parks.
Examine the radical idea of creating national parks for the enjoyment of everyone.
Investigate the efforts of Theodore Roosevelt, John Muir and others to protect the land.