As the Arctic Melts, An Ancient Culture Faces Ruins

RICHARD GLENN stood as still as a statue, gazing through sunglasses over the piercing white of the sea ice and the deep, flashing darkness of the Arctic Ocean. Three miles from shore north of Barrow, Alaska, he was a sentinel for a group of Iñupiaq subsistence hunters, watching for the spout of a bowhead whale but looking out even more carefully for signs that the ice edge upon which he was standing might break off and float away.