Cities appear as floating mirages in these breathtaking images

Aussie photographer hits the road, returns with nice pictures

Swiss artist takes on climate change in playful photo series

Photographer Gary Jensen captures melting icescapes inside a Chicago cold storage facility

Neil Wagner on how global warming threatens the world economy

Brooklyn photographer captures surfer's paradise on film

The Walk Score team released new bikeability rankings, and they contain a few surprises

In prestigious Vendee Globe sailing race, Javier Sanso's boat relies on the power of wind, water and sun

Striking images of our home planet as seen from orbit in 2012

The Nature Conservancy forges surprising partnerships to further its mission