Response to Grosswald and Hughes (2004), Brigham-Grette et al. (2003). “Chlorine-36 and 14C chronology support a limited last glacial maximum across central Chukotka, northeastern Siberia, and no Beringian ice sheet,” and, Gualtieri et al. (2003), “Pleistocene raised marine deposits on Wrangel Island, northeastern Siberia: implications for Arctic ice sheet history”