Mountains untouched by a human footprint, water they could sell at Tiffany.

WSJ: Learning to Fly Fish��And Fend Off the Grizzlies | Traveler's Tale

Fay and pilot Peter Ragg followed a general map of the "human footprint" on the continent while automatic cameras snapped a photo of the ground below every 20 seconds.

NPR: African Flyover Reveals Impact of 'Human Footprint'

Consider just a few of the noteworthy highlights of the human ecological footprint.

FORBES: Planet Under Siege: Family Planning Critics Soon To See Global Population Reach 7,000,000,000

In the next few years, GLOBE will be focusing in particular on the goal of enhancing climate education with a focus on global warming, the carbon and energy footprint, climate and human health, and ecosystems, agriculture, and biodiversity.

WHITEHOUSE: Ask Dr. H: "How Can Kids Apply Their Ingenuity to Global Challenges?" | The White House

The footprint we found, they decided, was most likely human.

BBC: On the trail with Bigfoot-hunters