Ignatian Summit at St. Xavier, 2018 : Our Planet, Our Home, Our Responsibility: Mike Nichols, National Geographic photographer

A tree-climbing scientist and his team have learned surprising new facts about giant sequoias by measuring them inch by inch. This National Geographic story contains stunning photographs by Mike Nichols, and text by David Quammen, St. Xavier Class of 1966

The May 2016 issue of National Geographic magazine is devoted entirely to America's first national park. Text written by David Quammen, St. Xavier Class of 1966