Amazon: A River's Journey from the Andes to the Atlantic

THOMAS PESCHAK is a National Geographic Photographer, Explorer and Storytelling Fellow who specializes in documenting the beauty and fragility of the world's oceans, islands and coasts. He has produced 15 feature stories for National Geographic magazine covering an array of natural history and conservation issues, from manta rays to marine protected areas.

Originally trained as a marine biologist, Peschak has won 17 Wildlife Photographer of the Year and seven World Press Photo Awards. He is a popular speaker for National Geographic Live! circuit, with lectures in in 15 cities on three continents. His official TED talk, "Dive Into an Ocean Photographer's World," has been viewed more than one million times.