Fabrice Monteiro travelled to the most polluted places in Africa and created terrifying characters who roamed their midst dressed in eerie debris. They are spirits, he says, on a mission to make humans change their ways. Informed by Africa’s environmental problems, Fabrice Monteiro’s photographs aim to highlight urgent ecological issues all over the world. His series “The Prophecy” is on show at Photo Basel 2017 until 18 June. (Photo by Fabrice Monteiro/Photo Basel 2017/Mariane Ibrahim Gallery/The Guardian)

Members of the Beltane Fire Society take part in Samhuinn Fire Festival on October 31, 2023 in Edinburgh, Scotland. Once celebrated from October 31 to November 1 by ancient Celts, Samhain, pronounced “SOW-in” or “SAH-win”, marked the shift from the brighter to the darker half of the year and was seen as a time when the boundary between the physical and spirit worlds was thought to weaken, influencing the development of contemporary Halloween customs. (Photo by Murdo MacLeod/The Guardian)

Shortlisted images in the running to be crowned Photobox Instagram photograph of the year range from furry friends to the Holi festival to the meaning of love. Judges, including the Guardian’s former picture editor Eamonn McCabe, have whittled down 180,000 submissions to unearth a shortlist that celebrates the best of social media. Winners will be announced October 3, 2018. Here: Najac, France. Travel shortlist. (Photo by Aaron Jenkin/@aaronjenkin)

This year’s World Nomad Games, a celebration of nomadic heritage, took place in the Issyk-Kul province of Kyrgyzstan. Eleanor Moseman photographed female competitors who had travelled from all over central Asia and eastern Europe, and explored the difficulties and challenges they face as competitors. (Photo by Eleanor Moseman/The Guardian)

Rare images of wild tigers in Bhutan, captured by camera traps, show tigers and other animals using high-altitude wildlife corridors which are lifelines to isolated tiger populations and critical to genetic diversity, conservation and growth. Here: A wild Bengal tiger (Panthera tigris tigris) captured on a camera trap in corridor eight at an altitude of 3,540 metres in Trongsa, Bhutan. (Photo by Emmanuel Rondeau/WWF UK/The Guardian)

Since Rodrigo Duterte became president last year, his brutal campaign against drugs has claimed thousands of lives. Human rights groups say he is guilty of crimes against humanity, yet that is scant comfort to those mourning loved ones. Here: Constantino de Juan’s seven children sit on a sofa that still bears the bullet hole from their father’s shooting. Juan was preparing a spaghetti dinner on his daughter’s birthday when he was killed. (Photo by James Whitlow Delano/Funded by the Pulitzer Center on Crisis Reporting/The Guardian)

A South Korean soldier wear North Korea's military uniform, acting as North Korean soldier during an anti-terror and anti-chemical drill session held as part of the 2011 Ulchi Freedom Guardian (UFG) event on August 17, 2011 in Seoul, South Korea. The 11-day UGC, which features drills including the handling of chemical and biological attacks, is a regular joint exercise between US and South Korean troops to prepare for potential emergencies on the Korean Peninsula. (Photo by Chung Sung-Jun/Getty Images)

Sandrine Kerfante has had a fascination with “doubles” ever since meeting her mother’s twin as a child. In 2012, this lifelong captivation inspired her to create a blog called twin-niwt, which celebrates photographs of doubles in all their forms. “I’m fascinated by the idea of the duo, repetition, symmetry, reflection, mirror games and all the symbolism associated with it”, she says. “I think it’s a topic often present in photography, more or less consciously”. (Photo by Sandrine Kerfante/The Guardian)