Showcasing "Remarkable Dogs". We start with "Bob" who was made a Distinguished Member of the Royal Humane Society. Also showcased: Buddy, America's first seeing eye dog; Greyfriars Bobby; Moustache. Image: Herbie with his handler Sapper Darren Smith at the Australian War Memorial.

The domestication of dogs dates to Neolithic times which began in about 10,200BC. The engravings in Saudi Arabia are special because they seem to show the dogs being harnessed to assist in the hunting. Image: Rock Art Carvings in Saudi Arabia (sciencemag.org)