Finding Cahokia: the tools of an archaeological dig

Ars Technica's Annalee Newitz visited the Cahokia Mounds archaeological dig site near St. Louis, Missouri and talked with archaeologists about their mapping and digging tools. Read the article: http://arstechnica.com/features/2016/12/theres-a-1000-year-old-lost-city-beneath-the-st-louis-suburbs/