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Rio de Janeiro with about 10 million people is one of the most violent cities in the world. Portuguese photographer Joao de Carvalho created one of the most powerful photojournalistic sets showing the life in the slums. He says: "I decided to start documenting this reality because I was driven into a curiosity of what took the city to get into this extreme of violence that happens today...

Texas based photographer, Tom Hussey reflects on his recent collaboration with the pharmaceutical company, Novartis for their "Reflections" campaign. "Based on an earlier portfolio image, I was awarded a job for an Alzheimer's drug called the Exelon Patch made by Novartis. The Exelon Patch helps patients maintain long-term memories during the early stages of this horrific disease. I was fortunate to be included in a lot of the early concept stages for the campaign...

A cloud is a visible mass of droplets of water or frozen crystals suspended in the atmosphere above the surface of the Earth or another planetary body. A cloud is also a visible mass attracted by gravity, such as masses of material in space called interstellar clouds and nebulae. Clouds are studied in the nephology or cloud physics branch of meteorology. On Earth the condensing substance is typically water vapor, which forms small droplets or ice crystals, typically 0.01 mm (0...

Many famous impressionist painters used photos to create their paintings. It helped them to save money that they would pay a model. Impressionism was a 19th-century art movement that began as a loose association of Paris-based artists whose independent exhibitions brought them to prominence in the 1870s and 1880s...

Throughout the history of photography, technological advances in optics, camera production, developing, and imaging have had an effect on the way people view images. Up until 1960, most printed photographs were black and white. Cameras that could print colour film began to be popular in the 1960s, particularly with the invention of the Polaroid camera invented by Edwin Land, which could print out a colour film print directly from the camera, within a few minutes of taking the picture...

Porcelain is a ceramic material made by heating raw materials, generally including clay in the form of kaolin, in a kiln to temperatures between 1,200 °C (2,192 °F) and 1,400 °C (2,552 °F). The toughness, strength, and translucence of porcelain arise mainly from the formation of glass and the mineral mullite within the fired body at these high temperatures...

Long exposure photography entails using a long-duration shutter speed to sharply capture the stationary elements of images while blurring, smearing, or obscuring its moving elements. Technique When a scene includes both stationary and moving subjects (for example, a fixed street and moving cars or a camera within a car showing a fixed dash-board and moving scenery), a slow shutter speed can cause interesting effects, such as light trails...