“The sun was setting on my first day in Katmai National Park when we set out for the shores of Hallo Bay to catch that golden-hour light,” photographer Sara Stein remembers. “We were staying on a small boat, so unlike the traveling seaplanes that frequent the area, we could stay until the sun had set. “We rounded a small hill between the shore and the vast grasslands that the bears liked to frequent, and, to our joy, we were greeted with multiple sows and their cubs. Sitting in the long grass, I focused my lens on this pair, a couple of 2-year-olds, roughly playing while their mother chomped on the fresh grass, always keeping an eye on them. “In a moment...