DENVER -- A new report backs up Colorado's efforts to tap the best available science, including advances in GPS and radio tracking technologies, to protect big-game migration corridors as animals move between winter and summer feeding ranges. Dan Gibbs, executive director of the Colorado Department of Natural Resources, said with some 70,000 people moving to the state each year, protecting corridors is essential to reduce the number of collisions between vehicles and wildlife on Colorado roads. "And try our best to incorporate, whether it's underpasses, or overpasses, or other mechanisms that we can put in place, to really protect the animals but protect the motorists as well," Gibbs explained. " ...