Max Pearson presents a collection of this week's Witness History episodes from the BBC World Service.

We hear about the invention of the labradoodle, the first dog in space and how a Yorkshire terrier called Smoky became the world's first therapy dog.

Author Mackenzi Lee talks about her book, The History of the World in Fifty Dogs. She discusses Napoleon Bonaparte's turbulent relationship with pugs and the first guide dogs in America.

Plus, the guide dog who saved its owner's life during the 9/11 terror attacks and the man who dressed up as a dog to protest life in post-Soviet Russia.

Contributors:

Wally Conron - dog breeder. Mackenzi Lee - author. Michael Hingson - 9/11 terror attacks survivor. Professor Victor Yazdovsky - Russian immunologist. Oleg Kulik - Russian conceptual artist. Adrian Brigham - friend of American World War II veteran Bill Wynne.

(Photo: Estie the labradoodle and Lola the cockapoo. Credit: Reena Stanton-Sharma)