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00:04:58
Obsidian points, Spanish terra-cotta tiles, Prohibition-era liquor bottles—history lies buried underfoot in the Presidio, one of the earliest settlements in San Francisco, occupied in turn by the Ohlone Indians, Spanish, Mexicans, and the U.S. Army. Archaeologist Kari Jones shares tales of recent digs and discoveries in this national park, and explains why most artifacts are dug up only to be reburied.

00:32:01
Weather permitting, correspondents Anne Jensen and Laura Thomas will have just returned from their first day at their field location at Nuvuk (a.k.a. Point Barrow). We'll take a look at conditions after the long winter, and watch as these scientists, and their students, prepare for a summer of digging.

00:06:28
Interview with Ice Stories correspondent and archeologist, Ann Jensen.