This week on Arizona Illustrated … CARBON 14: Tucked away in his lab on the University of Arizona Campus, Archaelogical Scientist Greg Hodgins solves unsolved mysteries; THE DEMONSTRATION GARDEN: Find out what is going on at the U of A “Farm Property” on Campbell Avenue just south of the Rillito River; DIOSCURI: Exploring our ‘Divided Selves’ in the Lung at Biosphere 2; FAR AFIELD: She-PHI, The all-girl ‘STEP’ group from Holladay Magnet Elementary School in Tucson.