This three- art series journeys the length, breadth, and height of the Andes to reveal the incredible natural history of the longest mountain range on earth. In the Northern Andes, rising mountains and eru ting volcanoes have roduced a stunning variety of life. Boasting oison frogs, legless am hibians, high-flying monkeys, the continent"s only bears, and the world"s last tro ical glaciers, the Northern Andes are unlike anywhere else on Earth