Archaeologists digging at a 13,800-year-old site in interior Alaska have unearthed thousands of artifacts and fossils, including what may be the bones of the earliest domesticated dogs in the Americas, the earliest needles and dwellings in the Western Hemisphere, and stone tools that reveal cultural connections across the Bering Land Bridge.At a site called Shégˊ Xdaltthˊíˊ (which means "They Were There" in the Alaska Native Athabascan language), about 34 miles (55 kilometers) southeast of Fairbanks, archaeologists have excavated an encampment that some of the first people to settle in North America used off and on for a millennium. Shégˊ Xdaltthˊíˊ is located in eastern Beringia, the geogra...