LOOK: Australia's croc hunters, phenomenal visions of earth, and more

See how scientists are using brain rewiring techniques to crack the code of addiction, sit back and take in the sights on India’s longest train, and more in this edition of LOOK. | [A kaleidoscope of humanity on India’s longest train](. [VIEW ONLINE]( [A kaleidoscope of humanity on India’s longest train](. [National Geographic]( [PHOTOGRAPHY]( | [COMMUNITY]( | [FOLLOW US]( | [SUBSCRIBE]( ISSUE 27 | [SEPTEMBER 5, 2017](#) [L O O K] Great photography happening across National Geographic Magazine [Unlocking the Secrets of Addiction]( [+]( [NAT GEO PLUS]( . Photograph by Max Aguilera-Hellweg Decades of research have provided insight into how addiction affects human brain chemistry and behavior, but the search for a cure-all for relapse has been elusive. Scientists are now examining how rewiring certain parts of the brain may lead to greater long-term success. [Look Closer +]( Picture Stories [The Rugged Lives of Crocodile Hunters]( . Photograph by Trevor Beck Frost Once on the verge of extinction, saltwater crocodiles have made a comeback in northern Australia—so much so that a limited number are allowed to be hunted each year as a means of controlling the population. But pursuing these powerful animals is not for the faint of heart. [Look Closer +]( PHOTO TIP #0027 “Focus on being in the moment, not messing with your camera. Cameras are wonderful but can also be a big distraction.” —Greg Kahn, National Geographic photographer[@gregkahn]( [Visions of Earth]( . Photograph by Ingo Arndt Revel in breathtaking views of the planet we call home. [Look Closer +]( [Animal Portraits]( . Photograph by Michael O'Neill Our picks from last year’s [Nature Photographer of the Year Contest]( set the stage for what’s to come. [Look Closer +]( Travel [Life Aboard India’s Longest Train Ride]( . Photograph by Matthieu Paley Much of life in the modern world involves rushing from place to place. Photographer Matthieu Paley took a different approach when he boarded the Vivek Express for a 2,637-mile ride from Kanniyakumari in the south to Dibrugarh in the north. “My favorite kind of photography happens when I slow down; but these days it’s not easy,” Paley says. “On trains, I am held hostage, disconnected, suspended in time. It forces me to slow down. This is what I crave: Give me a long, slow ride and I am happy.” [Look Closer +]( SELFIES ON ASSIGNMENT . Photographer Erin Trieb is based in Istanbul but was visiting her family in Houston when Hurricane Harvey hit. Trieb [helped her mother and three dogs evacuate their flooded home]( in the Bellaire neighborhood before heading back out into chest-deep floodwaters to cover the storm for National Geographic. You can follow [Erin]( on Instagram. . [Are You the Next Nature Photographer of the Year?]( The 2017 Nature Photographer of the Year Contest is now open for submissions! Submit to one of four categories—Wildlife, Landscapes, Aerials, and Underwater—for a chance to win. [Enter Today]( [Shop]( [Donate]( [Subscribe]( [Travel]( [PHOTOGRAPHY]( [COMMUNITY]( [FOLLOW US]( [SHOP]( [DONATE]( [SUBSCRIBE]( [TRAVEL]( [FB]( [Twitter]( [IG]( You are receiving this email because {EMAIL} is signed up to receive National Geographic communications. If you prefer not to receive emails from us, please [unsubscribe](. [About Us]( | [Contact Us]( | [Privacy Policy]( To ensure that you receive your National Geographic emails, please add ng@e.nationalgeographic.com to your address book now. [Learn how](. National Geographic | 1 145 1 7th Street N.W. | Washington, D.C. 2 0036 Copyright © 2017 National Geographic Partners, LLC. All rights reserved.