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Translucent Goby, Indonesia, 1999Photograph by David Doubilet
Every month, National Geographic staff photographer Mark Thiessen answers your photography questions—and spills the secrets behind the shots.
Congo's Virunga National Park is home to some of the last remaining mountain gorillas on Earth. But war, poaching, and the charcoal trade are threatening their existence.
See more big cats of different stripes—and spots—in this big cat gallery.
Look at elephant photos from dawn till "tusk" in this photo gallery.
Visit Mexico with this interactive map.
Signs of and solutions to the world's water crisis.
Door frames, clouds, flowers—anything you see in your image can help to naturally frame your subject and create a strong visual center in your photo.
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