Abandoned dog, Bear, becomes a conservation superhero as he’s deployed to sniff out koala survivors in the wake of Australian bushfires. Koalas depend on eucalyptus trees that burn quickly and intensely. When fires sweep through their homes, they often don’t have time to escape. Bear has been following the aftermath of the fires, finding sick, injured or starving koalas that otherwise would have perished. He has now found more than 100.