Yann Arthus-Bertrand is perhaps the best known aerial photographer on the planet. He has sold more than 3 million copies worldwide of his seminal photo essay Earth From Above, a decade-spanning attempt to photograph all the vistas of the planet from the sky, whether by helicopter, hot air balloon, or anything else that flies.

His newest project takes a different view -- focusing more closely on the people who live on this planet. Called 6 Billion Others, the project was a centerpiece of Pangea Day 2008.