A sequence of artificial overpasses and underpasses in the US assist wildlife, massive and small, cross the street safely, stopping collisions and saving lives, to save lots of wildlife site visitors blocked by busy roadways. is About 1,500 of those buildings have already been constructed. Journalist Conor Knighton appears to be like at how they’ve protected genetic variety in animal populations and drastically diminished street kill. He additionally visits the location of the Wallis Annenberg Wildlife Crossing close to Los Angeles, which when accomplished will assist cougars cross one of many nation’s busiest highways.