Socotra Island has been referred to as the “Galapagos of the Indian Ocean” for its remarkable biodiversity. More than a third of its 825 plant species, 90% of its reptile species and 95% of its land snail species are not found anywhere else in the world. Photographer Catalina Martin-Chico visited the island off the coast of Yemen.

Three years ago, Roger Hayhurst was a 19-year-old who took on a superhero identity – the “Knight Warrior” – to discourage wrongdoing in his crime-ridden neighborhood. Since then he has met a girl, gotten engaged and hung up his cape. Photographer Jacob Russell got to know Hayhurst in and out of costume.

Kerry Mansfield was a healthy 31-year-old when she was diagnosed with breast cancer. She documents her treatment in self-portraits, from before treatment through chemotherapy, mastectomy surgery and post-reconstructive surgery.

Terry O’Neill photographed the greats of the ‘60s – The Beatles, Twiggy, the Rolling Stones, Jean Shrimpton – and his friendship with his subjects came through in his work. By catching them candidly, O’Neill redefined reportage photography of stars at a time when studio photography was the norm.

In New York City exist places where nature has not been rearranged by man, places where the freshest air is under a shady maple. Not ostensibly visible, but these untouched oases exist – giving Earth its air, in all five boroughs, sought out and photographed by Mitch Epstein in his new book “New York Arbor.”

Matthew Mills McKnight, 33, was living in northern Idaho when he first decided to ask Shaun Winkler if he’d let him take photos at the Ku Klux Klansman’s compound. Then he followed the Klansman during his run for sheriff. When the primary ballots were cast in May 2012, Winkler was trounced.

During its 60 years of producing film and cameras for instant photography, Polaroid encouraged artists to experiment. “The Polaroid Years” looks at the history of a medium that, for the most part, no longer exists.

After the Japanese government put a muzzle on Kansuke Yamamoto’s writings, the surreal artist expressed himself through his art. His anti-government ideals peak through his photocompositions, which range from straightforward gelatin prints to combination prints with multiple negatives to multimedia pieces.