One of the busiest highways in the western U.S. is I-25, a concrete artery that runs north to south across the state of Colorado, funneling roughly 100,000 cars per day through the fast-growing exurbs south of the capital, Denver. While I-25 facilitates human journeys, it disastrously truncates the movements of another set of commuters. For … Continue reading The long and winding road to safe highways: Inside the global movement to reconnect habitat