The pumas inhabiting glacier-rich Patagonia are well-adapted to cold weather and have even been known to swim across Argentino Lake. This prospect led to a scene of stunning contrasts for photographer Luis Alejandro Acharez when he crossed paths with a puma relaxing on an iceberg floating in Los Glaciares National Park. With the big cat’s handsome looks…

National Geographic photographer David Doubilet’s journey of creating his signature “above and below the sea” shots began three decades ago in Grand Cayman. It was there that two worlds converged on either side of a razor-thin molecular border between sky and sea. Above were the “impossibly blue skies and billowing clouds;” below, the surreal, “sun-dappled…