Can the Black-tailed Prairie Dog help restore an entire prairie ecosystem?
Over the past century the grasslands of northern Mexico have been taken over by shrubby mesquite and turned to desert. Ecologist Gerardo Ceballos is on a mission to turn them back. Can he restore an entire prairie ecosystem? Ceballos hopes he can, with the help of an unlikely ally, Cynomys ludovicianus. Ari Daniel Shapiro reports from Chihuahua.