A prisoner from the Pedrinhas prison is carried to receive medical help after he was injured during a fight between rival gangs inside the jail, in Sao Luiz, capital of Maranhao state, January 8, 2014. The recent posting on a major Brazilian news website of a video filmed last December 17 by Pedrinhas prisoners of the decapitated and tortured bodies of rival inmates inside the jail has highlighted some of the problems present in the country's prison system which houses nearly twice as many prisoners as its capacity, according to official statistics. (Photo by Douglas Cunha/Reuters/O Estado do Maranhão)

An Indian artist performs with fire during a procession as part of “Bonalu” festival in Hyderabad, India, Monday, Aug.10, 2015. Bonalu is a month long Hindu folk festival of India's Telangana region dedicated to Kali, the Hindu goddess of destruction. (Photo by Mahesh Kumar A./AP Photo)

Tibetan monks dressed as demons attend the Beating Ghost festival at the Yonghe Temple, also known as the Lama Temple, in Beijing on March 19, 2015. The Beating Ghost festival, or Da Gui festival in Chinese, is an important ritual of Tibetan Buddhism and is believed to expel evil spirits and shake off troubles. (Photo by Wang Zhao/AFP Photo)

Naturally, it is important that a baby learn the right habits. This woman demonstrates that smoking is wrong for babies. From a series of images parodying women's lifestyle and beauty magazines. (Photo by Jacobsen/Getty Images). 1955

A photographer has shared his stunning gallery of African sunrises and sunsets. Paul Goldstein says he has spent years trying to photograph the perfect beginning and ending of the Masai Mara day. Thanks to his role as guide for Exodus Travels, there have been countless opportunities to document the beautiful natural spectacle. Photo: “African Fire”: Ostrich at sunset. (Photo by Paul Goldstein/Rex Features)

These are the amazing panoramic photographs that look like little planets. They were taken by photographer Dan Arkle, 34, from Sheffield, UK. He said: “On a sharp summit, you feel literally on top of the world, with dramatic views in all directions, including straight down. I tried using conventional photography to capture this feeling, but even with a wide angle lens I couldnt get all the view in the image”. Here: “Taken at the tiny summit of Cima Piccola in the the Tre Cima group in the Dolomites, Italy. The large peak is Cima Grande Some remote peaks have a summit register, and my climbing partner Steve can be seen signing this in the bottom of the picture”. (“Little Planets” Project. Photo and comment by Dan Arkle)

Patrick Scolaro and Cory Sullivan of Boca Raton playfully duke it out wearing masks that were handed out to attendees of the Rock the Vote concert at Mizner Park after the debate. (Photo by Allen Eyestone/The Palm Beach Post)

In Dougie Wallace’s photos of Mumbai taxis, the chatter, yelling, and constant horns of the city are almost audible. A selection of his images is on show at Gayfield Creative Spaces, Edinburgh, as part of the Retina photography festival until 30 July. For four years, the Glasgow-born Wallace focused his photos on one kind of taxi in particular: the Premier Padmini, a 1960s workhorse painted in black and yellow. Locally known as “Kaali-Peeli”, there were once more than 60,000 of them in the Indian city. But thanks to laws restricting pollution, the cars now are fast disappearing from Mumbai’s streets. (Photo by Dougie Wallace/The Guardian)