A Polisario fighter sits on a rock at a forward base on the outskirts of Tifariti, Western Sahara, September 9, 2016. At a rocky outpost in Western Sahara, a new generation of soldiers who have never known war are mobilising as tensions resurface in one of Africa's oldest disputes after a quarter century of uneasy peace. (Photo by Zohra Bensemra/Reuters)

One of the last incoming trains arrives outside the main train station after Deutsche Bahn cancelled all train traffic in Germany due to heavy storms, Frankfurt, Germany, Thursday, January 18, 2018. (Photo by Michael Probst/AP Photo)

German KUKA Robotics' robot LBR iiwa demonstrates a flower arrangement at the International Robot exhibition in Tokyo, Wednesday, December 2, 2015. (Photo by Shizuo Kambayashi/AP Photo)

For her series “Dolce Vita in Hell”, Swiss photojournalist Stéphanie Buret headed to Eritrea and found a country struggling to haul itself out of oppression – but with its art deco buildings still looking stunning. (Photo by Stéphanie Buret/The Guardian)

A Kevo smart lock is demonstrated during the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada January 4, 2015. The lock, which opens with a smart phone App and a touch, is smart enough to know what side of the door you are on and won't accidentally unlock the door when you are inside. A new subscription service offers unlimited e-keys and other benefits, a representative said. (Photo by Steve Marcus/Reuters)

A man rides his loaded tricycle next to three schoolgirls in Shanghai on December 11, 2015. (Photo by Johannes Eisele/AFP Photo)

The Fuel Girls with their fire and pyro performance on stage in London on September 20, 2025. The Big London Tattoo Show, the UK's largest tattoo convention, is in full swing at ExCeL London, transforming the venue into a bold celebration of tattoo artistry and alternative culture. (Phoot by Imageplotter/Alamy Live News)

An Argentina soccer fan watches the team lose to Saudi Arabia at a World Cup Group C soccer match, played on a large screen in the Palermo neighborhood of Buenos, Aires, Argentina, early Tuesday, November 22, 2022. (Photo by Gustavo Garello/AP Photo)