National Geographic photographer shares heart-wrenching video of starving polar bear

Video Screenshot. Credit: Paul Nicklen National Geographic photographer Paul Nicklen's Instagram account typically features breathtakingly beautiful scenes and stories from around the globe. Whales, penguins, and polar bears make up the brunt of his latest posts, all of them the kinds of photos wildlife photographers dream of capturing. One of his latest videos, however, is the exact opposite. Six days ago, Nicklen shared a heart-wrenching video of a starving polar bear scrounging for food--a sh...