Sentence:  Note that, while not in Alaska, one site from the adjacent Yukon Territory has been included as well; it, too, would have been within easter <WSD>Beringia</WSD> during the last glaciation. 
Meaning of the word marked with <WSD> tags:  The Bering land bridge, a geographical phenomenon roughly 1,000 miles (1,600 km) wide (north to south) at its greatest extent, which joined present-day Alaska and eastern Siberia at various times during the Pleistocene ice ages; the land bridge previously occupying what is now the Bering Strait.