At 15,600 years old, this print predates the previous oldest evidence of humans in South America by 1,000 years.

The Ecological Footprint adds up all the ecological services people demand that compete for space. It includes the biologically productive area (or biocapacity) needed for crops, grazing land, ...

Have you ever looked at your footprint? Maybe you’ve walked through a puddle or sand on a beach, and seen the steps you’ve left behind. Our footprints leave a trace, and tell a story about where we’ve ...