Researchers believe the ax dates to between 1400 B.C.E. and 1275 B.C.E. and is a relic of the Bronze Age, when humans started to work with metal John Smith stumbled upon the ax head when he was walking his dog. Forestry England John Smith and his dog were out for a walk in the woods, with the pup getting a normal workout of chasing sticks and squirrels. But before the trip ended, they had fetched something far more interesting: an ax head that likely dates back 3,400 years. Smith noticed the tool while walking in the Forest of Dean, he tells BBC News ’ Tess de la Mare. “My dog ran off, rooting around, so I went to go and get the dog and, as I looked down in the roots, I saw the ax head—it just sparkled the most beautiful green color,” Smith says. “It was just wedged in one of the holes, so I pulled it out and there it was.” He turned it in to Forestry England , which tapped Cotswold Archaeology for support with identification and conservation.…