Photographer Lori Nix hand-crafted dioramas are fictional scenes of a post-apocalyptic world in which plants and decay reclaim both grand and mundane structures. Each structure is built in Nix's living room and can take over half a year to build. Photo: Library, 2007. Photographer Lori Nix says this is the most popular image she has made for this project that she calls “The City”. (Photo by Lori Nix)

On Earth Day this year, NASA asked people all around the world a question: “Where are you on Earth Right Now?” To answer this question people were asked to post their selfie on social media. The goal was to use each picture as a pixel in the creation of a “Global Selfie” – a mosaic image that would look like Earth appeared from the space. The 3.2 gigapixel “Global Selfie”, was made the with 36,422 individual images.

Throughout the course of the long war in Afghanistan, Coalition troops have relied on thousands of military working dogs to help keep them safe, and make their jobs easier. The dogs are trained to detect explosives, to find illegal drugs, to search for missing comrades, or target enemy combatants. Not only are they active on the front lines, but behind the lines they serve as therapy dogs, service dogs, and loyal companions. They also share the same risks as the ground troops, suffering injuries and sometimes death on the battlefields. Gathered here are images of these dogs and their handlers in Afghanistan and back home, from over the past several years, part of the ongoing series here on Afghanistan.

Catherine Nelson is a visual artist who uses the digital medium to paint images together into personal and imaginary landscapes. Trained as a painter in Sydney and London and with years of experience in the creation of visual effects for feature films like Moulin Rouge and Harry Potter, she now has dedicated her skills to her own art work combining the techniques from both these worlds into a new contemporary art medium. Her latest series have been exhibited in Australia, New Zealand, China, Korea, USA and Europe and have captivated audiences and art collectors in cities like Sydney, Paris, Los Angeles, Beijing and Seoul.

“About nine years ago Photographer Bob Carey and his wife, Linda moved to America's East Coast. Even though the move was exciting, exhilarating, and inspiring, it was a big and dramatic change. The self portraits were a perfect way of expressing himself. He posed in different surroundings wearing a pink tutu. The result is a wonderful, inspiring and poetic series of self portraits: The Tutu Project” – Michael Werner. (Photo by Bob Carey via TheTutuProject.com)