(from left) Students Melissa Golden, Lauren Appleby, and Taylor Kline inspect a stream site in Butte, Mont., that is returning to a healthy ecosystem after years of pollution from the mining industry. The students, along with 24 others, took part in a two-month Interdisciplinary Field Study Program that yields academic credit in anthropology, ecology, geology, and P.E. courses. See story and Peter Frey's photo essay.