Scientists search for ways to battle deadly fungus devastating North America's bats

The association between bats and Halloween dates back thousands of years, based on the superstition that the flying mammals are omens of death. But for nearly two decades, North American bats have been facing a deadly threat themselves: a fungal disease called white-nose syndrome. Ali Rogin speaks with New York Times columnist Carl Zimmer for more. PBS News is supported by - https://www.pbs.org/newshour/about/funders