Since the discovery of flint tools in the superficial formations of many parts of the world, all geologists believe that barbarian men existed at an enormously remote period; and we know that at the present day there is hardly a tribe so barbarous as not to have domesticated at least the dog.
Lurreko alde askotako azaleko formazioetan sukarrizko objektuak aurkitu zirenetik, geologo guztiek uste dute gizaki basatia antzina-antzinako garaietan izan zela eta badakigu gaur egun ez dagoela ia tribu basati bakar bat ere, txakurra bederen hezi ez duenik.