Teeming with images of spectacular underwater scenes from around the world, Call of the Blue is the culmination of a five-year project by the photographer and ocean conservationist Philip Hamilton. This groundbreaking book includes contributions from acclaimed scientists and ocean “guardians”, who reveal what drove them to answer the call of the blue. (Photo by Philip Hamilton/The Guardian)

Meet Claire, the 3-year-old bull terrier travels the world with Dutch photographer Alice van Kempen, 48, and poses for photographs in abandoned buildings. Van Kempen seeks out abandoned places to photograph in pursuit of her passion for urban exploring, bringing along her globetrotting pooch as her trusted companion. Here: Claire plaiyng the piano in an abandoned Cafe in Luxembourg. (Photo by Alice van Kempen/Caters News)

Devotees attend the annual voodoo festival in Ouidah January 10, 2016. The national voodoo holiday in the West African country of Benin had a distinctively political accent this year as practitioners from Africa and the Americas gathered on Sunday to offer prayers and sacrifices for peace. Hundreds of followers of the traditional religion gathered in the Atlantic coast town of Ouidah, once an important port in the slave trade, to pray for calm during the tiny country's presidential election scheduled for February. (Photo by Akintunde Akinleye/Reuters)

Monks take pictures with their mobile phones of the mummified body of a monk at Puzhao temple in Quanzhou, Fujian Province, China, January 10, 2016. According to local media, the monk named Fuhou died three years ago at the age of 94 and his remains was placed in a vat and turned into a mummy as a sign of respect. (Photo by Reuters/Stringer)

German Yesakov, 25, a cameraman from Russia, dressed as movie character Captain Jack Sparrow, and his bride Anastasiya pose with a sailing ship decoration during their wedding ceremony in the southern city of Stavropol, Russia, February 5, 2016. Yesakov dressed as the Pirates of the Caribbean character and picked the film for the theme of his wedding as a surprise to his 17-year-old bride Anastasiya. (Photo by Eduard Korniyenko/Reuters)

Israeli woman, Nora Lifschitz, 28, holds an injured Egyptian fruit bat at her home in Tel Aviv February 22, 2016. Lifschitz says that she began caring for injured fruit bats from her home two years ago and now has some 70 of the flying mammals which she plans to release back into nature once they are healthy. (Photo by Baz Ratner/Reuters)

A man holds a cow at the cattle market in Maiduguri, Nigeria, March 9, 2016. A Nigerian government push to strangle the Boko Haram insurgency has shut down the cattle trade that sustained the city of Maiduguri, leaving many residents with no livelihood, including many of the two million people displaced by the war. In recent months the army has taken back much of the territory lost to the jihadists during the five-year insurgency. (Photo by Afolabi Sotunde/Reuters)

Mohamed Mostafa, 35, carries dyed yarns at a dye workshop in old Cairo, Egypt, March 17, 2016. Egypt's hard currency crisis and competition from modern factories in Asia and at home threaten one of the last dye workshops in Egypt. But one of its owners takes comfort in the trade's ancient resilience. Mohamed Mostafa boasts that the profession dates back 3,000 years, so it can survive anything. (Photo by Amr Abdallah Dalsh/Reuters)