Deep in the jungle-you're suddenly face to face with the great gorilla.

It's clear that even here, you are sharing a moment with one of man's closest relatives.

He's staring at you with those eyes that look so...human.

Experiences like this have made National Geographic photographer Nick Nichols a fierce advocate for conservation of shrinking wildlife habitats. Michael "Nick" Nichols's work had led him deep into the jungle, where he faced numerous challenges, including a stint in hospital with cerebral malaria, among other things.

Editor-at-large for photography at National Geographic magazine, his award-winning work has been featured in numerous articles.

In addition to his books on changes in the U.S. zoos and the gorillas' struggle fort survival, Nichols co-authored a book on chimps with Jane Goodall.

He has been featured in Rolling Stone, American Photographer, and many other magazines.

He has also been named Shell Wildlife Photographer of the Year and has been honoured by World Press Photo, among others.