Wade Davis: Gorgeous photos of a backyard wilderness worth saving. Steven Addis: A father-daughter bond, one photo at a time. David Gallo shows underwater astonishments. Jonathan Klein: Photos that changed the world. Lisa Kristine: Glimpses of modern day slavery. Becci Manson: (Re)touching lives through photos. Ryan Lobo: Photographing the hidden story. Erik Johansson: Impossible photography. Edward Burtynsky photographs the landscape of oil. Edward Burtynsky on manufactured landscapes. David Griffin on how photography connects us.