Dogs are just great!
Yeah, but its sad that direct ancestor of the dog is extinct.
Really?  What was the direct ancestor?
Dog
The domestic dog ("Canis lupus familiaris" when considered a subspecies of the wolf or "Canis familiaris" when considered a distinct species) is a member of the genus "Canis" (canines), which forms part of the wolf-like canids, and is the most widely abundant terrestrial carnivore. The dog and the extant gray wolf are sister taxa as modern wolves are not closely related to the wolves that were first domesticated, which implies that the direct ancestor of the dog is extinct. The dog
years old. 
Additional artifacts can be found in numerous private collections, as during the 1950s several amateur archaeologists were permitted access to the caves.
Excavations Dog skull.
Discovered during the 1860s, a dog-like cranium identified as being that of a Paleolithic dog was AMS dated to 31,680 years old. Mitochondrial DNA indicates that the canid was not a direct ancestor of modern dogs, but rather of an extinct side branch.
Carbon Dated fossils:
Source: 
Human habitation.
Neanderthal habitation of the caves