Dr Sanz worked on the paper with Josep Call, also from the Max Planck Institute of Evolutionary Anthropology, and David Morgan from the Wildlife Conservation Society and Chicago's LincolnParkZoo.
The Wrigley Run is comprised of starting at Wrigley Field and running down Clark Street through Wrigleyville, reaching and running through LincolnPark near the Petting Zoo, and ultimately taking Rush Street past The Frog Bar back to Michigan Ave along the Magnificent Mile shopping district back to the hotel.