Polar Bear Dens Are Hard for Humans to See, but Drone-Mounted Radar Can Help

As humans encroach on polar bear habitats, new tools such as drone-mounted radar can prevent us from disrupting the hidden dens where bears give birth

https://www.scientificamerican.com/article/polar-bear-dens-are-hard-for-humans-to-see-but-drone-mounted-radar-can-help/