As species extinction, environmental protection, animal rights, and workplace safety issues come to the fore, zoos and aquariums need keepers who have the technical expertise and scientific knowledge to keep animals healthy, educate the public, and c...

For years, tour guide Daniel Lum has brought visitors as well as his children out to the remote corners of Barrow, Alaska, one of the northernmost cities in the world, to witness polar bears and walrus on the dark, sandy beaches. Over time, snapping...