Photographer Jimmy Nelson has spent years traveling the globe in a quest to document the world’s most fantastic indigenous cultures before they and their way of life disappear. In the 17-minute TED talk above, Nelson shares some of his best large format portraits and some fascinating things that he has learned along the way. (Note: there’s a bit of nudity in the photos).

Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.